Physical Science

Chapter 13: Light

Light

1.
What makes a neon light glow?
A)The filament is heated until it glows, producing light.
B)Phosphors absorb ultraviolet light from gas molecules and begin to glow.
C)The gas inside it is heated until it glows, producing light.
D)Electrons collide with the gas molecules inside it and produce visible light.
2.
The angle at which light strikes a surface is __________ the angle at which it is reflected.
A)twice as great as
B)less than
C)greater than
D)the same as
3.
Which of the following types of cells is located in the retina?
A)olfactory
B)cone
C)sclera
D)conjunctiva
4.
Which of the following colors of visible light has the longest wavelength?
A)violet
B)yellow
C)red
D)blue
5.
Which of the following best describes an incandescent light?
A)gives off light when phosphors absorb ultraviolet radiation
B)contains argon gas at low pressure
C)gives off light when tungsten filament is heated
D)uses the least amount of electricity to produce light
6.
If a transparent blue filter is placed over a camera lens, what happens to visible light entering it?
A)All colors of visible light pass through the filter and enter the camera lens.
B)Blue light is transmitted by the filter to the camera, and other colors of light are absorbed by the filter.
C)Blue light is reflected by the filter away from the camera, and the other colors of visible light enter the camera.
D)Blue light is absorbed by the filter, and the other colors of visible light enter the camera lens.
7.
Which of the following cells is most useful at night?
A)rod
B)blue cone
C)red cone
D)green cone
8.
What determines the color of an object?
A)the index of refraction of the object
B)the index of diffraction of the object
C)the wavelength of light it reflects
D)the wavelength of light it absorbs
9.
Reflection of light waves from a smooth, mirror like surface is called __________ .
A)regular reflection
B)irregular reflection
C)diffuse reflection
D)refraction
10.
What property of a material indicates how much light slows down when traveling in it?
A)density
B)index of diffusion
C)index of refraction
D)wave index
11.
A glass prism __________ light, producing the individual colors of visible light.
A)reflects
B)diffracts
C)refracts
D)diffuses
12.
Light waves vibrate in only one direction in __________ light.
A)reflected
B)polarized
C)diffused
D)refracted
13.
__________ materials only absorb and reflect light.
A)Transparent
B)Opaque
C)Clear
D)Translucent
14.
When visible light passes through a prism, why does red light bend the least?
A)Shorter wavelengths cannot pass through a prism.
B)Longer wavelengths are refracted more by a prism than shorter wavelengths.
C)Longer wavelengths are refracted less by a prism than shorter wavelengths.
D)Longer wavelengths cannot pass through a prism.
15.
The part of the eye where light is focused is called the __________ .
A)retina
B)pupil
C)lens
D)iris
16.
Which of these types of material transmits almost all of the light that strikes it?
A)translucent
B)transparent
C)opaque
D)reflective
17.
The greater the difference in densities of air layers is, __________ .
A)the more the light passing through is refracted
B)the less the angle of incidence of light passing through them
C)the less the light passing through is refracted
D)the greater the angle of incidence of light passing through them
18.
Optical fibers are __________ that can transmit light from one place to another.
A)opaque glass fibers
B)coherent beams
C)transparent glass fibers
D)filters acting as parallel slits
19.
A __________ is a colored material that absorbs some colors and reflects others.
A)prism
B)filter
C)pigment
D)laser
20.
__________ light is light of only one wavelength that travels with its crests and troughs aligned.
A)Compact
B)Coherent
C)Incoherent
D)Incandescent
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