Light Review

Which statement best tells the ways in which light interacts with matter?

• Light can come from the sun, fire, or a light bulb.

• Light waves can be reflected, refracted, or absorbed by matter.

• Laser light goes through matter, and all other light gets stopped by matter.

• Only visible light can interact with matter.

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Waves of red light and yellow light go through air and strike a piece of glass. The diagram shows how the two kinds of light interact with the glass. Which statement describes how the glass interacts with red and yellow light?

• The glass absorbs red light and transmits yellow light

• The glass transmits red light and absorbs yellow light.

• The glass reflects both red and yellow light.

• The glass transmits both red and yellow light

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The electromagnetic spectrum includes all electromagnetic waves, from radio waves with longwavelengths and low frequencies to gamma rays with short wavelengths and high

frequencies. Which statement best describes how fast these waves travel in a vacuum?

• Gamma rays travel much faster than others because they have the highest frequencies.

• High frequency waves travel somewhat faster than low frequency waves

• Infrared waves travel faster than ultraviolet waves.

• All electromagnetic waves travel at the same speed.

Electromagnetic radiation is energy that travels in waves. Two types of electromagnetic waves are infrared waves and ultraviolet waves. Which of these statements describes a

property that is shared by infrared waves and ultraviolet waves?

• Both waves have the same energy.

• Both waves have the same frequency.

• Both waves have the same wavelength.

• Both waves travel at the same speed in a vacuum.

Electromagnetic energy travels through space in waves. The electromagnetic spectrum includes all electromagnetic waves, arranged according to frequency and wavelength.

Which of these is an example of an electromagnetic wave?

• radio waves

• sound waves

• ocean waves

• gravitational pull

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The visible part of the electromagnetic spectrum consists of the colors that we see in a rainbow. Different colors correspond to different wavelengths of light. Which color of

visible light has the shortest wavelength?

• red

• green

• violet

• yellow

Which of these materials best scatters the light that strikes it?

• pure water

• shiny mirror

• frosted glass

• eyeglass lens

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Which color will a red rose appear to be if only a blue light reached it?

• red

• white

• black

• purple

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In which of these situations would light slow down?

• from glass to air

• from ice to water

• from plastic to air

• from a vacuum to air

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Sunlight contains all visible wavelengths of light. Each wavelength is a different color.

When sunlight passes into and out of a raindrop, the light rays bend. Which color of light bends the most?

• blue

• green

• orange

• red

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