AP Physics 2 Optics Quiz

Light passes through a converging lens and forms the image shown in the diagram. Which ray reaches the image plane in the least amount of time?

• Ray A

• Ray B

• Ray C

• None of the above

What can be determined about the location of the object?

• s_o = f

• s_o > f

• s_o < f

• s_o is undefined

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NGSS.HS-PS4-3

Green light traveling through air enters water (n=1.33) at a 20^o angle, with respect to the normal. Which does not change upon entering the water? Select all that apply.

• frequency

• wavelength

• speed

• velocity

• angle (measured from the normal)

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NGSS.HS-PS4-1

Specular reflection of Mt. Hood is shown above. Which correctly compares the intensity of incident light (I_i) to the intensity of the reflected light (I_r)?

• $I_i\ \ge\ I_r$

• $I_{i\ }\le\ I_r$

• $I_i\ <\ I_r$

• None of the above

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NGSS.HS-PS4-3

NGSS.HS-PS4-5

Parallel rays of monochromatic light are incident upon two identical diverging lenses before reaching a screen. Which best describes the intensity of the light at point P?

• Greater than if there were only one lens

• Less than if there were only one lens

• Equal to when there is only one lens

• Depends upon the focal length of the lens

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NGSS.HS-PS4-3

Light in a vacuum has wavelength, λ. What is the wavelength of light upon entering a material with an index of refraction, n?

• $n\lambda$

• $\frac{n}{\lambda}$

• $\frac{n}{c\lambda}$

• $\frac{\lambda}{n}$

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NGSS.HS-PS4-1

Students collect the materials shown above. Which student(s) will be able to form a real image? Select all that apply.

• Student W

• Student X

• Student Y

• Student Z

A green laser has a wavelength of 532 nm in a vacuum. What is the frequency of green light?

• 4.55 x 10¹⁴ Hz

• 5.64 x 10¹⁴ Hz

• 4.55 x 10¹¹ Hz

• 5.64 x 10¹¹ Hz

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NGSS.HS-PS4-1

In the lab, students shine a red laser and a blue laser into glass (n=1.54) at the same small angle. Which Θ_r is measured closest to the normal line inside the glass?

• Red, it slows down the least

• Red, it slows down the most

• Blue, it slows down the least

• Blue, it slows down the most

• They have the same Θ_r

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NGSS.HS-PS4-5

Monochromatic light (λ=550 nm) passes through a diffraction grating with 2,000 lines per centimeter. If a screen is 1m away from the grating, determine the distance between m=0 and m=1.

• 5.00 x 10^-6 m

• 0.115 m

• 0.226 m

• 0.639 m

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NGSS.HS-PS4-1