Amplify Light Waves Review

These graphs show the wavelength and amplitude of light coming from three lasers. Could any of these lasers be giving off a different type of light?

• Yes. Laser 2 could be giving off a different type of light because Laser 2 has a different wavelength than Lasers 1 and 3.

• Yes. Laser 3 could be giving off a different type of light because Laser 3 has a different amplitude than Lasers 1 and 2.

• Yes. All three lasers must be giving off different types of light because every light source gives off its own type of light.

• No. All three lasers must be giving off the same type of light because all three are lasers, and the same kind of light source gives off the same type of light.

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In Lesson 1.2, you observed that a solar-powered toy moved when you shined a flashlight on it. Select all of the statements below that accurately explain how this happened.

• There was energy in the toy that was activated by the light.

• Energy from the flashlight was absorbed by the toy.

• The flashlight absorbed energy from the toy.

• Light from the flashlight carried energy.

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What does this piece of evidence from the "What is Melanin?" article prove? (check all that apply)

• The genetic material in skin cells with more melanin absorbs less UV light from the sun.

• UV light is attracted to skin cells.

• The genetic material in skin cells with more melanin absorbs more UV light from the sun.

• Melanin absorbs UV light from the sun, which can keep some UV light from reaching genetic material.

• The genetic material in skin cells with less melanin absorbs more UV light from the sun.

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In order to see an object, light must be

• reflected off the object and into your eyes

• absorbed by your genetic material

• reflected off the object then off the ground then into your eyes

• transmitted into your skin

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In order for light to change an object, that object must _______ the light and its energy.

• transmit

• absorb

• reflect

• increase

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Why do we see objects as white?

• All colors of visible light are absorbed by an object and no light is being reflected into our eye.

• All colors of visible light are absorbed by an object and then reflected into our eye.

• All colors of visible light are reflected off an object and then to our eye.

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The distance from one peak of a wave to the next

• Wavelength

• Amplitude

• Frequency

• Rate

A type of wave that carries energy from one place to another, even through empty space

• Ocean

• Sound

• Heat

• Light

• The wave sports fans do in a stadium for fun

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The maximum height of a wave

• Reflection

• Frequency

• Amplitude

• Wavelength

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This word means "to give off"

• transmit

• reflect

• emit

• transmit