chapter 6 concepts

How fast can light travel in one second, if it is moving through a vacuum? 3,000,000 kilometers 18,600 kilometers 186,000 kilometers 30,000 kilometers 300,000 kilometers

300,000 kilometers

All electromagnetic waves travel at: 30,000 km/sec 300 km/hr. 300,000 km/sec 300,000 km/hr 30,000 km/hr

300,000 km/sec

What is the velocity of a wave if the distance between the crests is 16 meters and 40 waves go by every 10 seconds? 4 m/sec 64 m/sec 16 m/sec 32 m/sec 8 m/sec

64 m/sec

A light wave has a wavelength of about: a few meters to more than a few thousand kilometers. 400 to 100 nanometers. a millimeter to a micron. a meter to a millimeter. 7500 to 4000 angstroms.

7500 to 4000 angstroms

Which statement best describes transverse waves? The energy moves perpendicular to the wave direction. Echoes are formed from transverse waves. Transverse waves are a special type of longitudinal wave. The transverse wave moves particles in the direction that the wave is moving. A wave a frog would make jumping up and down on a lily pad.

A wave a frog would make jumping up and down on a lily pad

The Doppler Effect is best described as: how humans see the colors red and blue. how dolphins navigate in the world's oceans. how bats fly and locate their food. a change in wave frequency when source or receiver is moving. a change in wave frequency when neither source nor receiver is moving.

a change in wave frequency when source or receiver is moving.

The ability of microwave ovens to cook food depends partly upon the fact that microwaves are: absorbed quickly by water molecules, which does nothing to heat food. absorbed quickly by water molecules, which generates heat. reflected by the interior of an oven, which causes heat to be generated in the oven wall. absorbed in dry air and thus heat the whole oven and its contents. scattered by water molecules, which helps heat the glass door of the oven.

absorbed quickly by water which generates heat

Gamma radiation is a shorter wavelength than: microwaves all of the above radio waves X-rays visible light

all of the above

What aspect of a sound wave makes it seem loud to people hearing the sound? velocity. wavelength wavelength frequency amplitude

amplitude

Turning up the volume of music or speaking louder means that the sound wave has changed: wavelength. frequency. speed. amplitude. none of the above.

amplitude.

If you are observing a light source moving very rapidly towards you, the Doppler Effect predicts that the light will be: bent. radiated. transmitted. red-shifted. blue-shifted.

blue shifted

White materials scatter all wavelengths of visible light in all directions in a process called: absorption. reflection. refraction. transmission. diffusion.

diffusion

What characteristic of waves is measured in Hertz? energy amplitude speed length frequency

frequency

Compared to microwave radiation, infrared radiation: has longer wavelengths. is a faster wave. is a slower wave. is visible to the human eye. has shorter wavelengths.

has shorter wavelengths

Sound waves with low frequencies: have low pitches. have low amplitudes if they are loud. are more likely to experience destructive interference. travel at faster speeds than sound waves with high frequency. have high pitches.

have low pitches

Albert Michelson was the first U.S. scientist to win the Nobel Prize. His prize was for: his research into static electricity. his work with accelerating electrical charges. proving Maxwell's equations again. proving Maxwell's equations again. his studies of light.

his studies of light.

Cats' eyes are more sensitive to__________ than humans'. X-rays visible light gamma rays infrared waves radio waves

infrared waves

Bats navigate by emitting high pitched sound waves and calculating wave crests per second. listening for an echo from obstructions. killing all the moths within 10 meters. attracting various insects toward the sound. hoping humans do not hear them.

listening for an echo from obstructions.

What practical use has been found for gamma rays? generating light and heat cooking food and heating water carrying radio signals detecting the speed of a moving vehicle medical applications

medical applications

Line-of-sight communications and radar rely heavily on what type of electromagnetic wave? radio waves gamma rays visible light X-rays microwaves

microwaves

Which of the following has a frequency of 440 Hz? an FM radio station an AM radio station middle A musical note high C musical note a television station

middle A musical note

Of the types of radiation listed below, the only one that humans can detect is: gamma rays X-rays infrared waves none of the above visible light

none of the above

Which is not associated with broadcast radio waves? frequency modulation amplitude modulation frequency slices or bands electron motion in an antenna none of the above

none of the above

Waves transfer energy from: one speed of wave to another. one place to another. none of the above. one wavelength to another. one frequency to another.

one place to another

Individual particles in a transverse wave move: perpendicular to the wave direction. in large circles. perpendicular to the medium. parallel to the wave direction. in small circles.

perpendicular to the wave direction

Another word for constructive interference is: amplitude. acceleration. reinforcement. destructive. Doppler Effect.

reinforcement

Which of the following is strictly a longitudinal wave? Sound waves Laser light Any electromagnetic waves Water waves Light waves

sound waves

Which of the following is the same for all kinds of electromagnetic waves? transmission wavelength speed energy frequency

speed

The higher the frequency of a sound wave: lower the pitch. the faster it travels. the longer the wavelength. louder it is. the shorter the wavelength.

the shorter the wavelength

The fundamental difference between electromagnetic waves and other types of waves is that electromagnetic waves: move more slowly than all other types of waves. are invisible regardless of wavelength. transfer energy without transferring mass. do not experience constructive or destructive interference. all have the same wavelength.

transfer energy without transferring mass.

Light passing through a window glass is an interaction called: absorption. the greenhouse effect. scattering. transmission. reflection.

transmission

Human skin can be strongly affected by what type of electromagnetic radiation? ultraviolet radiation X-rays visible light gamma rays radio waves

ultraviolet radiation

Which type of radiation is commonly used to sterilize medical equipment? microwave radiation radio waves infrared radiation ultraviolet radiation fluorescence

ultraviolet radiation

Sound waves cannot travel through: a vacuum. water. glass. very dense materials. helium.

vacuum

Electromagnetic waves are produced: where electromagnetic waves are bent. where there is heat and light. when electrical charges are accelerated. when positive and negative charges meet. none of the above.

when electrical charges are accelerated.

Human eyes are most sensitive to this color yellow green violet red blue

yellow