Amplify Light Waves

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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NGSS.HS-PS4-1

Based on this information, which type of light might cause the glass to melt?

• The infrared light can cause the glass to melt.

• The yellow light can cause the glass to melt.

• The X-ray light can cause the glass to melt.The X-ray light can cause the glass to melt.

• Any of these types of light can cause the glass to melt, because all light carries energy that can cause materials to change.

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NGSS.MS-PS1-4

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.HS-PS4-5

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

• The optical cavity

• The gain medium

• The power supply

• The cooling system

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 light wave amplification?

• Solar panels

• Fiber optic communication

• Photosynthesis

• Thermal imaging

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NGSS.HS-PS4-5

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

• To focus the light waves

• To amplify the light waves

• To reflect and sustain the light waves

• To change the color of the light waves

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NGSS.HS-PS4-3

Which of the following best describes the process of stimulated emission in lasers?

• Absorption of photons by electrons

• Emission of photons by electrons without external influence

• Emission of photons by electrons due to external photons

• Scattering of photons by electrons

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NGSS.HS-PS4-3

What is the significance of coherence in amplified light waves?

• It increases the speed of light

• It allows light to travel longer distances

• It ensures light waves are in phase

• It changes the color of light

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NGSS.HS-PS4-5

Which experiment can demonstrate the amplification of light waves?

• Double-slit experiment

• Michelson-Morley experiment

• Young's modulus experiment

• Laser operation experiment

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NGSS.HS-PS4-5