Amplify Light Waves Review

Which statement best describes this image?

• Different types of waves have different wavelengths.

• Different types of waves have different amplitude.

• All waves have the same amplitude and wavelength.

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NGSS.MS-PS4-1

Light waves carry [ ] from one place to another.

Answer explanation

Light waves carry energy from place to place. If a material absorbs the light, the material also absorbs the energy.

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NGSS.MS-PS4-1

The same type of light can be brighter if it has a different ​ (a)   . If the ​ (b)   is different, it is a different type of light.

• amplitude

• wavelength

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NGSS.MS-PS4-1

Draw what happens to energy when light is reflected. Use yellow arrows to represent energy.

Answer explanation

Energy is only absorbed when light is absorbed.

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

What is the primary function of a laser in amplifying light waves?

• To increase the frequency of light

• To increase the amplitude of light

• To increase the coherence of light

• To increase the speed of light

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NGSS.MS-PS4-1

Which component in a laser is responsible for amplifying light waves?

• The gain medium

• The optical cavity

• The power supply

• The cooling system

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NGSS.HS-PS4-3

In the context of light amplification, what does the term 'population inversion' refer to?

• More electrons in the ground state than in the excited state

• Equal number of electrons in the ground and excited states

• More electrons in the excited state than in the ground state

• No electrons in the excited state

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NGSS.HS-PS4-3

Which of the following is a real-world application of amplified light waves?

• Solar panels

• Fiber optic communication

• Photosynthesis

• Thermal imaging

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

What is the role of the optical cavity in a laser?

• To focus the light

• To amplify the light

• To reflect the light back and forth

• To change the color of the light

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NGSS.MS-PS4-2

How does the wavelength of light change when it is amplified?

• It increases

• It decreases

• It remains the same

• It becomes zero