Unit 8- Waves

Which of the following best describes how the sun's energy reaches Earth?

• As a single wavelength of light

• As radiation with a wide range of wavelengths

• As sound waves

• As a solid beam of light

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What happens to light when it passes through a prism?

• It is absorbed completely

• It is reflected back

• It is refracted and separated into a spectrum of colors

• It remains unchanged

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Explain why light waves travel faster in air than in water.

• Air is denser than water

• Water absorbs more light

• Light waves slow down in denser materials

• Light waves speed up in denser materials

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Which of the following is true about white light?

• It is made up of a single color

• It is made up of a spectrum of many different colors

• It is only visible in the dark

• It cannot be split into different colors

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How does a mirror affect light?

• It absorbs all the light

• It refracts the light

• It reflects the light

• It changes the color of the light

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Plan an experiment to demonstrate how light can be absorbed by different materials.

• Use a single material and measure light intensity

• Use multiple materials and measure the temperature change

• Use a mirror to reflect light

• Use a prism to separate light

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What is the primary reason that sound waves travel slower than light waves in air?

• Sound waves are absorbed by air

• Sound waves require a medium to travel

• Light waves are electromagnetic and travel faster

• Sound waves are heavier than light waves

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Which of the following best explains why we see a rainbow?

• Light is absorbed by raindrops

• Light is reflected by the ground

• Light is refracted and dispersed by raindrops

• Light is blocked by clouds

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Describe how you would use a glass of water to demonstrate refraction.

• Shine a light directly through the water

• Place a straw in the water and observe the bending

• Cover the glass with a lid

• Use a mirror to reflect light into the water

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What happens to light when it hits a black surface?

• It is completely reflected

• It is completely absorbed

• It is refracted

• It changes color

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