Physics 18, 19, 27 Review

Nauseen wants to observe the phenomenon of interference with dark and bright fringes. what kind of light source should she use to obtain the interference pattern?

coherent light

when a photon is scattered, the increase in wavelength is called the:

compton effect

when the light falls on a soap bubble or on the oily film spread on a water puddle, a spectrum of colors is observed. How is this spectrum of colors formed?

constructive and destructive interference of light waves

Which optical instrument produces a magnified, virtual, and inverted image of small objects?

a microscope

which of the following statements in incorrect?

a photon has energy but no momentum

A rainbow is an example of __________.

all of the above

which property is a characteristic of single slit diffraction but not double slit diffraction?

bands get thinner farther from the band

an example of an electromagnetic wave is

light

what is the most likely outcome of increasing the number of slits per unit distance on a diffraction grating?

lines become narrower

in 1916 Einstein predicted what particle property of photons?

momentum

in an interference pattern of a double slit experiment, why does a bright band occur where constructive interference takes place?

the two wave fronts have a phase difference of one wavelength

which of the following statements about threshold frequency is correct?

threshold frequency depends on the work function of a metal

Atoms emit radiation only when their vibrational energy changes

true

Descartes and Snell worked around the time of Kepeler and Galileo

true

The virtual image of a lens is always on the same side of the lens as the object.

true

a concave lens causes light to diverge

true

a convex lens is used to obtain an enlarged virtual image

true

a transmission grating consists of many fine lines placed on a transparent medium such as glass or plastic

true

electrons exhibit wave properties such as diffraction

true

for a convex lens to form a virtual image the object must be located at some distances less that the focal length

true

in a single-slit diffraction, the central band gets thicker as the distance to the screen increases

true

in a single-slit diffraction, the central band gets thinner as the width of the slit increases.

true

light from two different flashlights does not produce an interference pattern because it is incoherent

true

light rays that are reflected twice inside a rain water droplet can produce a second-order rainbow

true

monochromatic light is light of a single frequency

true

the image produced by a concave lens is always virtual

true

the magnification for a concave lens is always reduced

true

total internal reflection occurs when light moves from an area of higher index of refraction to one of lower index and strikes the boundary at an angle greater than the critical angle

true

Drawing a ray diagram for an object far from convex lens requires how many rays?

two

A concave lens always produces what type of image?

virtual

the energy of a photon is inversely proportional to its _________

wavelength

when electromagnetic radiation above the threshold frequency falls on an object, it emits electrons:

without any time delay

which is the most reasonable slit spacing for a transmission diffraction grating?

1000 nm

if an object is placed at twice the focal length of a convex lens, where is the image located on the other side of the lens?

2 f

rainbows occur at _____________

40-42 degrees above the horizon

which scientist proved experimentally that a shadow of the circular object illuminated with coherent light would have a central bright spot?

Arago

which function correctly expresses how to determine the energy of a photon?

E= hf

which principle states that it is impossible to measure precisely both the position and momentum of a particle at the same time?

Heisenberg uncertainty principle

James Maxwell's experiments were proven to be correct through the work of

Hertz

which scientist proposed a mathematical solution for the wave nature of light?

Fresnel

which is a coherent source of light?

an invisible laser beam

the de Broglie equation shows that subatomic particles have properties that

are wave like

what is the most likely outcome of decreasing the wavelength of incident light on a diffraction grating?

distance between lines decreases

if an object is placed at twice the focal length of a convex lens, what is the position of the image?

behind the lens and inverted

a magnifying glass is an example of ___________

both a and b

electromagnetic waves have properties that are

both a and b

the Compton effect supports

both models of light

in Young's double-slit experiment using monochromatic light, the interference pattern consists of a central ________

bright band with alternate dark and bright bands on either side

what is the most likely outcome of decreasing the frequency of incident light on a diffraction grating?

distance between lines increases

which of the following objects can set a piece of paper on fire in the presence of sunlight?

convex lens

how can the distance between the first bright band and the central band be increased in a double slit experiment?

decrease the slit separation, increase the distance between of the screen from the slits, and increase the wavelength

Joe observes the photo impressions of patterns produced by a single-slit diffraction and a double-slit interference experiment. He concludes that the bright central band and evenly spaced dark and light bands on either side belong to the single-slit diffraction experiment. Moreover, the wide bright central band with narrow dimmer bands on either side belongs to the double-slit interference experiment.

false

an electron and a proton move with the same speed. the proton has the longer de Broglie wavelength

false

rainbows are formed because all colors of light bend the same amount when they enter a medium

false (different)

a concave lens causes light to converge

false (diverge)

the emission of electrons from a metallic surface depends on the intensity of the incident radiation

false (frequency)

as temperature decreases, the frequency at which a hot body emits the maximum amount of energy increases

false (increases)

a positive magnification means the image is inverted compared to the object

false (larger)

magnifications with values greater than one represent images that are smaller than the object

false (larger)

the bright band that occurs at m= 1 is called the central bright band

false (m= 0)

the image produced by a convex lens is always real

false (or virtual)

the integer value "n" in the equation for energy of vibration can have any value

false (positive numbers)

the colorful surface of a CD or DVD is the result of a transmission grating

false (reflection)

second order rainbows have the colors in the same order as the primary, brighter rainbow

false (reverse)

the magnification for a convex lens in always enlarged

false (sometimes)

in a single-slit diffraction, the central band gets thinner as the wavelength increases

false (thicker)

the lens of the eye has a fixed focal length

false (variable)

in Compton's experiment most scattered X-rays were uncharged, while others

had larger wavelengths

the photoelectric effect demonstrates that a photon

has kinetic energy only

in the Compton effect, the scattered photons

have less energy than the unscattered photons

which is likely to produce the brightest spectra?

holographic gratings

which of the following phenomena contradicted Maxwell's electromagnetic wave theory?

hot body emission spectrum

the energy of a photon is:

inversely proportional to its wavelength

when viewing an object through a microscope, the image will appear __________

inverted and larger than the object

when an object is placed at a distance greater than twice the focal length of the lens, the real image produced is __________

inverted and smaller than the object

an example of when total internal reflection occurs is when all the light passing from a region of higher index of refraction to a region of lower index of refraction

is reflected back into the region of higher index

in the photoelectric effect, light displays properties that are like a _____

particle

a device which causes a door to automatically open is an example of light displaying properties that are _______

particle like

which phenomenon demonstrates the particle nature of light?

photoelectric effect

what produces a color spectrum when white light reflects off the surface of a CD?

reflection grating

the wavelength of light in a medium is _______ the wavelength of light in a vacuum

shorter than

which phenomenon is not the result of thin film interference?

stained glass windows

how can Ali distinguish the diffraction pattern created by diffraction grating and the interference pattern produced by a double slit?

the interference pattern from a diffraction grating will have a narrow, equally spaced bright lines, and the interference pattern will have bright and dark bands

The constant "n" in Snell's Law of Refraction depends upon

the materials involved

the de Broglie wavelength of a particle is inversely proportional to:

the momentum of the particle

For a convex lens to produce a real, enlarged, inverted image which of the following must be true?

the objects distance must be greater than one focal length but less than twice the focal length

the wavelengths of light seen in a rainbow depend upon ____________

the relative positions of the sun, the water droplets, and the observer