Electromagnetic Energy Final Study Questions

A radiographic technique produces a patient dose of 2 mGya (200 mrad) at a source-to-skin distance (SSD) of 80 cm. What would be the patient dose at an SSD of 160 cm if the technique remaines the same? a.) 0.5 mGya b.) 0.8 mGya c.) 1.0 mGya d.) 2.0 mGya e.) 4.0 mGya

a.) 0.5 mGya

1 amu equals 1.66 x 10(-27) kg. Its energy equivalence is: a.) 1.5 x 10(-10) J b.) 1.5 x 10(-7) J c.) 1.5 kJ d.) 1.5 mJ e.) 1.5 nJ

a.) 1.5 x 10(-10) J

If an x-ray imaging system is operated at 40 kVp, then: a.) 20 keV x-rays are emitted. b.) All x-rays are emitted at 40 keV. c.) Non-ionizing x-rays are emitted. d.) X-rays up to 80 keV are emitted. e.) Zero-energy x-rays are emitted.

a.) 20 keV x-rays are emitted.

The velocity of light is: a.) 3 x 10(8) cm/s b.) 3 x 10(10) cm/s c.) 3 x 10(12) cm/s d.) 3.7 x 10(10) m/s e.) 3.7 x 10(8) m/s

a.) 3 x 10(8) cm/s

For any EM radiation: a.) An increase in frequency results in an increase in energy. b.) An increase in velocity results in an increase in energy. c.) An increase in velocity results in an increase in frequency. d.) An increase in wavelength results in an increase in energy. e.) An increase in wavelength results in higher frequency.

a.) An increase in frequency results in an increase in energy.

X-rays can be: a.) Attenuated b.) Compacted c.) Ionized d.) Subdivided e.) Weighed

a.) Attenuated

Which of the following is NOT a characteristic of the wave model of radiation? a.) Collision b.) Deflection c.) Reflection d.) Refraction e.) Transmission

a.) Collision

The energy of an x-ray photon is directly proportional to its: a.) Frequency b.) Mass c.) Velocity d.) Velocity squared e.) Wavelength

a.) Frequency

Which of the following types of electromagnetic radiation interact with matter such as a particle? a.) Gamma rays b.) Infrared radiation c.) Microwaves d.) Radiofrequencies

a.) Gamma rays

Diagnostic x-rays are: a.) High-energy electromagnetic radiation. b.) Long wavelength electromagnetic radiation. c.) Observed with varying velocity. d.) Photons with intermediate mass. e.) Photons with low frequency

a.) High energy electromagnetic radiation.

In the case of mass-energy conversions: a.) Nuclear fission is an example. b.) The inverse square law applies. c.) The law of conservation of energy is violated. d.) The law of conservation of matter is violated. e.) The wave equation is an example.

a.) Nuclear fission is an example.

The Planck constant (h) has units of: a.) eVs b.) eVm/s c.) JeV d.) Jm e.) Jm/s

a.) eVs

A radiograph produced at an SID of 100 cm results in an exposure of 1 mGya (100 mR). What would be the exposure if the SID were reduced to 90 cm? a.) 0.72 mGya b.) 0.81 mGya c.) 0.90 mGya d.) 1.11 mGya e.) 1.23 mGya

b.) 0.81 mGya

The energy of a 70 keV x-ray can be expressed as: a.) 1.1 x 10(-16) J b.) 1.1 x 10(-14) J c.) 1.1 x 10(-12) J d.) 1.1 x 10(-10) J e.) 1.1 x 10(-9) J

b.) 1.1 x 10(-14) J

The velocity of ultrasound in tissue is 1540 m/s. If a 1 MHz transducer is used, what will be the wavelength of the ultrasound? a.) 15.4 micrometers b.) 1.54 millimeters c.) 1540 millimeters d.) 15.4 centimeters e.) 1540 meters

b.) 1.54 millimeters

A source of 99mTc produces a radiation intensity of 1.5 microGya/hr (150 mR/hr) at 10m. At what distance does the exposure rate equal 10 microGya/hr? a.) 3.3 m b.) 3.9 m c.) 5.0 m d.) 6.7 m e.) 8.2 m

b.) 3.9 m

Which of the following types of radiation would be classified as EM? a.) 5 MHz therapeutic ultrasound b.) 30 m radio broadcast c.) 1000 Hz sound d.) Beta radiation e.) Heat convected from a radiator

b.) 30 m radio broadcast

What is the mass equivalence of a 35 keV x-ray? a.) 6.3 x 10(-31) kg b.) 6.3 x 10(-32) kg c.) 6.3 x 10(-33) kg d.) 6.3 x 10(-34) kg e.) 6.3 x 10(-35) kg

b.) 6.3 x 10(-32) kg

The distance from the earth to the sun is approximately 150 million km. If the earth were orbiting the sun at 50 million km, the solar intensity on the surface of the earth would be: a.) 3 times more intense. b.) 9 times more intense. c.) 12 times more intense. d.) 27 times more intense. e.) The same

b.) 9 times more intense.

The equivalence of mass and energy is described by: a.) The Bohr constant b.) Einstein's theory c.) Joule's laws d.) Newton's laws e.) Planck's theory

b.) Einstein's theory

Compared with red light, green light has a greater: a.) Charge b.) Energy c.) Mass d.) Velocity e.) Wavelength

b.) Energy

EM Radiation: a.) Exists at zero velocity. b.) Exists only if its velocity is 3 x 10*8 m/s c.) Has energy represented by amplitude. d.) Has mass that increases with increasing velocity. e.) Is usually shown as a square wave.

b.) Exists only if its velocity is 3 x 10*8 m/s.

When compared with visible light, x-rays have a greater: a.) Charge b.) Frequency c.) Mass d.) Velocity e.) Wavelength

b.) Frequency

In Einstein's relativistic equation, E=mc(squared): a.) c represents the velocity of ultrasound. b.) If the mass is measured in kilograms and the velocity in meters per second, energy will be measured in joules. c.) If the mass is measured in grams, the velocity must be measured in meters per second. d.) If the velocity is 3 x 10*8 m/s, mass should be in grams. e.) If the velocity is given as 186,000 miles/s, the energy will be in newtons.

b.) If the mass is measured in kilograms and the velocity in meters per second, energy will be measured in joules.

Invisible photons on the long-wavelength side of the visible-light spectrum can create a problem in the darkroom. Which of the following types of light are these photons likely to be? a.) Green light b.) Infrared light c.) Laser light d.) Maser light e.) Ultraviolet light

b.) Infrared light

Light has a constant velocity of C = 3 x 10(8) m/s. Therefore: a.) Its energy increases with increasing wavelength. b.) Its frequency decreases with increasing wavelength. c.) Its mass increases with increasing frequency. d.) Its velocity is also 3 x 10(12) cm/s. e.) Its velocity is also 3 x 10(12) mm/s.

b.) Its frequency decreases with increasing wavelength.

The frequency of electromagnetic radiation is: a.) Measured in disintegrations per second. b.) Measured in Hertz. c.) Measured in meters per second. d.) Proportional to the wavelength. e.) Proportional to velocity.

b.) Measured in Hertz.

Which type of electromagnetic radiation is NOT used for medical imaging? a.) Gamma rays b.) Microwaves c.) Radiofrequency d.) Visible light e.) X-rays

b.) Microwaves

At what level should visible light interact MOST readily? a.) Atomic b.) Molecular c.) Nucleon d.) Organ e.) Tissue

b.) Molecular

A single unit of electromagnetic radiation is also called a/an: a.) Ion b.) Photon c.) Proton d.) Quark e.) Strange

b.) Photon

An x-ray also can be correctly called a: a.) Mass b.) Photon c.) Pronon d.) Proton e.) Quantity

b.) Photon

In radiographs of bony structures embedded in soft tissue, the bone is: a.) Radiolucent b.) Radiopaque c.) Radiorefracted d.) Translucent e.) Transopaque

b.) Radiopaque

A 137Cs source used for instrument calibration has an intensity of 1 mGya/hr (100 mR/hr) at 20 cm. What would the intensity be 40 cm from the source? a.) 0.08 mGya/hr b.) 0.12 mGya/hr c.) 0.25 mGya/hr d.) 0.5 mGya/hr e.) 0.75 mGya/hr

c.) 0.25 mGya/hr

A radiographic technique produces an exposure of 2 mGya (200 mR) at a source-to-image receptor distance (SID) of 100 cm. What would the exposure be at an SID of 180 cm? a.) 0.31 mGya b.) 0.55 mGya c.) 0.62 mGya d.) 1.11 mGya e.) 1.25 mGya

c.) 0.62 mGya

If the exposure rate 1 m from a source is 9 mR/hr (90 microGya/h), what is the exposure rate 3 m from the source? a.) 90 microGya/hr. b.) 30 microGya/hr. c.) 10 microGya/hr. d.) 9 microGya/hr. e.) 1 microGya/hr.

c.) 10 microGya/hr

How far from a 1 m fluorescent bulb must one be before its light approximately obeys the inverse square law? a.) 1 m b.) 2 m c.) 3 m d.) 5 m e.) 7 m

c.) 3 m

If the entire mass of an electron (m=9.1 x 10(-31) kg) could be converted into an x-ray, its energy would be approximately: a.) 4.15 x 10(-15) eV-s b.) 4.15 x 10(-15) keV-s c.) 511,000 eV d.) 511 eV e.) 5.1 MeV

c.) 511,000 eV

Which of the following electromagnetic radiations is in the diagnostic x-ray region? a.) 78 eV b.) 12,000 eV c.) 65 keV d.) 36 MeV e.) 14 meV

c.) 65 keV

A photon that has energy of approximately 1 eV is MOST likely: a.) A gamma ray. b.) A radio emission. c.) An X-ray. d.) Therapeutic ultrasound. e.) Visible light.

c.) An X-ray.

The inverse square law is a result of: a.) Absorption b.) Attenuation c.) Divergence d.) Scatter e.) Transmission

c.) Divergence

The expression that relates x-ray energy and wavelength through the Planck constant is: a.) E=hf b.) E=hc c.) E=hc/wavelength d.) E=h/c*wavelength e.) E=wavelength*c/h

c.) E=hc/wavelength

The photon energy of an x-ray whose wavelength is 10 nm may be obtained most easily from which of the following? a.) E=mc(squared) b.) E=hf c.) E=hc/wavelength d.) E=wavelength*n e.) E=wavelength/hc

c.) E=hc/wavelength

Examples of EM radiation would NOT include: a.) 1.5 T, 63 MHz MRI b.) Cell phone signals c.) Forced-air heat d.) Light from an exit sign e.) Phosphorescence from a watch dial

c.) Forced-air heat.

A photon of red light: a.) Comes from a nucleus. b.) Has a higher frequency than an x-ray c.) Has a longer wavelength than a photon of green light. d.) Has more energy than blue light. e.) Has the same energy as microwaves.

c.) Has a longer wavelength than a photon of green light.

Visible light: a.) Consists of short-wavelength red radiation and long-wavelength blue radiation. b.) Has a higher frequency than ultraviolet light. c.) Has a shorter wavelength than microwaves. d.) Has a wavelength range of 1 to 100 mm. e.) Interacts with matter in the same way that x-rays do.

c.) Has a shorter wavelength than microwaves.

X-ray photons: a.) Are part of the ultrasonic spectrum. b.) Are relatively long wavelength electromagnetic radiation. c.) Have a higher frequency than visible light. d.) Have a longer wavelength than radiofrequencies. e.) Have the same velocity as ultrasound.

c.) Have a higher frequency than visible light.

The inverse square law states that: a.) Intensity and distance are proportional. b.) Intensity is directly proportional to the square of the distance. c.) Intensity is inversely proportional to the square of the distance. d.) The square of the intensity is directly proportional to the distance. e.) The square of the intensity is inversely proportional to the distance.

c.) Intensity is inversely proportional to the square of the distance.

X-ray wavelength is: a.) Directly proportional to frequency. b.) Directly proportional to velocity. c.) Inversely proportional to frequency. d.) Inversely proportional to velocity. e.) Usually designated by "c".

c.) Inversely proportional to frequency.

Which of the following statements about visible light is TRUE? a.) It can travel with any velocity up to 3 x 10*8 m/s. b.) It is deflected by a magnetic field. c.) It sometimes behaves like a wave. d.) Its energy is directly proportional to its wavelength. e.) The photoelectric effect demonstrates the wave model.

c.) It sometimes behaves like a wave.

Which of the following statements about photon interaction is TRUE? a.) Air is transparent and radiopaque. b.) Frosted glass is transparent. c.) Lead is radiopaque. d.) Soft tissue is radiopaque. e.) Window glass is opaque.

c.) Lead is radiopaque.

The development of modern quantum mechanics is attributed to: a.) Albert Nobel b.) Ernest Rutherford c.) Max Planck d.) Niels Bohr e.) William Coolidge

c.) Max Planck

If the distance from a point source is tripled, the intensity will be: a.) Nine times b.) One half c.) One ninth d.) One third e.) Three times

c.) One ninth

The principal difference between x-rays and gamma rays is their: a.) Energy b.) Frequency c.) Origin d.) Velocity e.) Wavelength

c.) Origin

The inverse square relationship applies to which of the following sources? a.) Gamma rays b.) Plane c.) Point d.) Ultrasound e.) X-ray

c.) Point

When white light is refracted through a prism, the following colors are emitted. Which has the longest wavelength? a.) Blue b.) Orange c.) Red d.) Ultraviolet e.) Yellow

c.) Red

When on uses the sine wave as a model: a.) Amplitude and frequency are directly proportional. b.) Amplitude and wavelength are directly proportional. c.) The distance from one peak to the next is the wavelength. d.) The distance from one valley to the next is the frequency. e.) The energy is proportional to amplitude.

c.) The distance from one peak to the next is the wavelength.

When various types of radiation are compared: a.) The mass equivalence of a television broadcast is greater than that of red light. b.) The mass equivalence of an FM broadcast is ggreater than that of ultraviolet light. c.) The mass equivalence of blue light is greater than that of red light. d.) The mass equivalence of microwaves is greater than that of x-rays. e.) The mass equivalence of red light is greater than that of ultraviolet light.

c.) The mass equivalence of blue light is greater than that of red light.

In the normal representation of an x-ray: a.) Energy is amplitude b.) Mass is indicated by c c.) Velocity is the speed of light d.) Velocity varies from zero to the speed of light. e.) Wavelength changes from short to long and back to short again.

c.) Velocity is the speed of light.

Which of the following equations can be used to compute the mass equivalence of an x-ray photon? a.) m = Ec(squared) b.) m = zv(squared) c.) m= E/c(squared) d.) m = 1/2 E(squared)

c.) m=E/c(squared)

Which of the following equations can be used to compute the mass equivalence of an x-ray if its frequency is known? a.) m=E/c(squared) b.) m=Ec(squared) c.) m=hf/c(squared) d.) m=h/wavelength x frequency e.) m=1/2c(squared)

c.) m=hf/c(squared)

The energy equivalence of an electron at rest is 511 keV, it is also: a.) 511 eV b.) 511 MeV c.) 0.51 eV d.) 0.51 MeV e.) 5.1 MeV

d.) 0.51 MeV

A frequency of 1 MHz is: a.) 1 cycle per second. b.) 10(2) cycles per second. c.) 10(3) cycles per second. d.) 10(6)cycles per second. e.) 10(9) cycles per second.

d.) 10 (6) cycles per second.

In a vacuum, x-rays travel with a velocity of: a.) 186,000 km/hr b.) 186,000 mph c.) 3 x 10(10) m/s d.) 3 x 10(10) cm/s e.) 3.7 x 10(10) cm/s

d.) 3 x 10(10) cm/s

A 1 tesla mRI device operates at a radiofrequency of 42 MHz. What is the wavelength of this radiation? a.) 4.2 millimeters b.) 7.1 millimeters c.) 42 centimeters d.) 7.1 meters e.) 42 meters

d.) 7.1 meters

If an instrument positioned 1 m from a point source is moved 50 cm closer to the source, the radiation intensity will: a.) Decrease by a factor of 2. b.) Decrease by a factor of 4. c.) Increase by a factor of 2. d.) Increase by a factor of 4. e.) Remain Constant

d.) Increase by a factor of 4.

According to quantum mechanics, the energy of an x-ray is: a.) Dependent on its origin. b.) Dependent on its velocity. c.) Directly proportional to its wavelength. d.) Inversely proportional to its wavelength. e.) Proportional to its amplitude.

d.) Inversely proportional to its wavelength.

The Planck constant has units of: a.) J b.) J-eV c.) J-kg d.) J-s e.) N-s

d.) J-s

The SI unit for energy is the: a.) Dyne b.) Electron volt c.) Erg d.) Joule e.) Newton

d.) Joule

When Einstein's relativistic equation is used to compute the energy equivalence of matter, it is usual to express such energy in: a.) Calories b.) Coulombs c.) Ergs d.) Joules e.) Newtons

d.) Joules

When the EM spectrum is considered, photons of a radio broadcast have relatively: a.) High energy and long wavelengths. b.) High energy and short wavelengths. c.) High frequency and low energy. d.) Low energy and long wavelengths. e.) Low energy and short wavelengths.

d.) Low energy and long wavelengths.

Longer wavelength x-rays have: a.) Higher energy b.) Higher mass c.) Higher velocity d.) Lower energy e.) Lower velocity

d.) Lower energy

When a radiograph is viewed, one might properly state that: a.) Bony structures are radiolucent. b.) Fat is radiopaque. c.) Fat is radioreflective. d.) Lung tissue is radiolucent. e.) Soft tissue is radiopaque.

d.) Lung tissue is radiolucent.

Which of the following terms is associated with diagnostic imaging? a.) Diffraction x-rays b) Grenz x-rays c.) Megavoltage x-rays d.) Superficial x-rays e.) Supervoltage x-rays

d.) Superficial x-rays

When the frequency of electromagnetic radiation is increased tenfold: a.) The velocity decreases to 1/10. b.) The velocity increases times 10. c.) The wavelength remains constant. d.) The wavelength decreases to 1/10. e.) The wavelength increases times 10.

d.) The wavelength decreases to 1/10.

To apply the inverse square law, one must know: a.) Energy, distance, and intensity. b.) One distance and one intensity. c.) The frequency or the wavelength of radiation. d.) Two distances and one intensity. e.) Two intensities and two distances.

d.) Two distances and one intensity.

In the model of an x-ray: a.) The amplitude of the sine wave is related to its energy. b.) The frequency of the sine wave is related to its velocity. c.) The wavelength of the sine wave is related to its velocity. d.) Two sine waves are positioned perpendicular to each other. e.) Two sine waves are superimposed.

d.) Two sine waves are positioned perpendicular to each other.

Which of the following characteristics is the same for both ultraviolet radiation and microwaves? a.) Amplitude b.) Energy c.) Frequency d.) Velocity e.) Wavelength

d.) Velocity

Which of the following has a constant value for all electromagnetic radiation? a.) Frequency b.) Mass c.) Origin d.) Velocity e.) Wavelength

d.) Velocity

Which of the following characteristics is the same for both x-ray photons and light photons? a.) Amplitude is the same. b.) Energy is the same. c.) Frequency is the same. d.) Velocity is the same. e.) Wavelength is the same.

d.) Velocity is the same.

The EM spectrum includes: a.) Particulate radiation at the speed of light. b.) Radiation described by the following formula: Wavelength=Frequency x Velocity. c.) Radiation with physical properties determined by mass. d.) X-rays and radar with the speed of light in a vacuum. e.) X-rays, gamma rays, electrons, and neutrons that are used in medicine.

d.) X-rays and radar with the speed of light in a vacuum.

The equivalent mass of an x-ray may be compared using: a.) m = hc/wavelength b.) m = hc/f c.) m = h*wavelength/c(squared) d.) m = hf/c(squared) e.) m = hfwavelength/c(squared)

d.) m = hf/c(squared)

A linear source of radium is 15 mm long. Such a source of radiation obeys the inverse square law at approximately what minimum distance from the source? a.) At contact b.) 15 mm c.) 25 mm d.) 75 mm e.) 105 mm

e.) 105 mm

The exposure rate from a 60Co source used in radiation therapy is 1 Gya/min (100 R/min) at 80 cm. What would the exposure rate be 40 cm from the source? a.) 0.25 Gya/min b.) 0.50 Gya/min c.) 1.0 Gya/min d.) 2.0 Gya/min e.) 4.0 Gya/min

e.) 4.0 Gya/min

Given the sine wave model of electromagnetic radiation: a.) Amplitude and velocity are inversely related. b.) Frequency and velocity are inversely related. c.) Frequency times amplitude is a constant. d.) Frequency times velocity is a constant. e.) Frequency times wavelength is a constant.

e.) Frequency times wavelength is a constant.

Given two x-rays, one of 50 keV and the other of 70 keV, the 70 keV x-ray: a.) Is most likely radioactive b.) Most likely came from a nucleus c.) Has a higher velocity d.) Has a longer wavelength e.) Has a higher frequency

e.) Has a higher frequency

X-rays: a.) Have a mass of 1 amu and are neutral. b.) Have a negative charge and zero rest mass. c.) Have a positive charge and zero rest mass. d.) Have zero rest mass and a charge of plus two. e.) Have zero rest mass and are neutral.

e.) Have zero rest mass and are neutral.

Which statement about visible light is CORRECT? a.) Black glass is lucent. b.) If matter completely absorbs visible light, it is transparent. c.) If matter attenuates visible light, it is opaque. d.) If visible light is transmitted but attenuated, the matter is transparent. e.) If visible light is transmitted unattenuated, the matter is lucent.

e.) If visible light is transmitted unattenuated, the matter is lucent.

The model used to describe an x-ray photon: a.) Consists of an S wave. b.) Has a radiofrequency field and a visual field. c.) Has an electrical field and an ultrasonic field. d.) Has an ultrasonic field and a magnetic field. e.) Is a sine wave.

e.) Is a sine wave.

The energy of an x-ray: a.) Can be computed from its mass. b.) Depends on its charge. c.) Increases with increasing wavelength. d.) Is a function of the Einstein constant. e.) Is inversely proportional to its wavelength.

e.) Is inversely proportional to its wavelength.

Which of the following MOST closely represents the term ATTENUATION? a.) Absorption of x-rays. b.) Deflection of x-rays. c.) Light absorbed in black glass. d.) Light transmitted through frosted glass.

e.) Light transmitted through frosted glass.

Which of the following terms does NOT apply to an x-ray? a.) Absportion b.) Attenuation c.) Diffraction d.) Penetration e.) Reflection

e.) Reflection

In the equation E=hf, the h: a.) Has units of energy b.) Is a variable c.) Stands for the Einstein constant d.) Stands for the Bohr constant e.) Relates photon energy for frequency

e.) Relates photon energy to frequency.

The energy of diagnostic x-rays is similar to that of which of the following radiations? a.) Diffraction x-rays b.) Grenz x-rays c.) Megavoltage radiation d.) Orthovoltage x-rays e.) Superficial x-rays

e.) Superficial x-rays

The frequency of a sine wave is: a.) The distance from crest to crest. b.) The distance from crest to valley. c.) The minimum to maximum. d.) The number of seconds that pass per crest. e.) The number of valleys that pass per second.

e.) The number of valleys that pass per second.

Which of the following is TRUE for both a 100 keV x-ray and a 10 keV gamma ray? a.) They have equal frequencies. b.) They have equal negative charges. c.) They have equal wavelengths. d.) They have the same origin. e.) They have zero mass.

e.) They have zero mass.

When x-rays are described, it can be said that: a.) They are deflected by a very strong magnet. b.) They can combine with other x-rays to form an atom. c.) They can create molecules. d.) They have a longer wavelength than radiowaves. e.) They travel in straight lines.

e.) They travel in straight lines.

Energy can be: a.) created but not destroyed b.) Destroyed but not created c.) Expressed in newtons d.) Measured in grays e.) Transformed into matter

e.) Transformed into matter

Which of the following is NOT an example of EM radiation? a.) Gamma rays b.) Grenz rays c.) Laser radiation d.) Star light e.) Ultrasonic diathermy

e.) Ultrasonic diathermy

Which of the following is an example of EM radiation? a.) Alpha rays b.) Diagnostic ultrasound c.) Positrons d.) Protons e.) Ultraviolet light

e.) Ultraviolet light

Which of the following terms is NOT associated with visible-light interaction? a.) Absorption b.) Reflection c.) Refraction d.) Transmission e.) Vaporization

e.) Vaporization

Which of the following is greater for a 30 keV x-ray than for a 60 keV x-ray? a.) Charge b.) Frequency c.) Mass d.) Velocity e.) Wavelength

e.) Wavelength

The wave equation is described as follows: a.) The product of frequency and velocity is constant. b.) Velocity is frequency divided by wavelength. c.) Velocity is wavelength divided by frequency. d.) Wavelength is the product of velocity and frequency. e.) Wavelength is velocity divided by frequency.

e.) Wavelength is velocity divided by frequency.

Visible light cannot be: a.) Absorbed b.) Diffracted c.) Reflected d.) Refracted e.) Weighed

e.) Weighed

A surface of which color reflects the MOST light? a.) Black b.) Blue c.) Green d.) Red e.) White

e.) White

Which of the following emissions is likely to obey the inverse square law? a.) Heat from an iron skillet. b.) Infrared radiation from a patient. c.) Skylight. d.) Visible light from a 2 m fluorescent bulb. e.) X-rays from a mobile imaging system.

e.) X-rays from a mobile imaging system.

The amplitude of a sine wave is its: a.) Frequency b.) Minimum to maximum c.) Velocity d.) Wavelength e.) Zero to maximum

e.) Zero to maximum

Radiation emitted from a standard radio broadcast antenna: a.) Has a higher frequency than gamma rays. b.) Has a higher frequency than microwaves. c.) Has relatively high energy. d.) Is EM radiation. e.) Is sound.

D.) Is EM radiation.