Optics

Practice Questions

GRE Subject Test: Physics › Optics

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1

A beam of light travels through a medium with index of refraction until it reaches an interface with another material, with index of refraction . No light is transmitted into the second material. At what angle (measured from the plane of the interface between the two materials) does the beam hit the second material?

2

A reflective sphere has a diameter of . The surface of the sphere makes a convex spherical mirror; what is its focal point?

3

A beam of light travels through a medium with index of refraction until it reaches an interface with another material, with index of refraction . No light is transmitted into the second material. At what angle (measured from the plane of the interface between the two materials) does the beam hit the second material?

4

A candle tall is placed to the left of a thin convex lens with focal length . What is the height and orientation of the image created?

5

A candle tall is placed to the left of a thin convex lens with focal length . What is the height and orientation of the image created?

6

A reflective sphere has a diameter of . The surface of the sphere makes a convex spherical mirror; what is its focal point?

7

A beam of unpolarized light passes through two linear polarizers whose polarization axes are at an angle theta with each other. The light initially has an intensity , and has an intensity of after passing through both polarizes. Find ?

8

A beam of unpolarized light passes through two linear polarizers whose polarization axes are at an angle theta with each other. The light initially has an intensity , and has an intensity of after passing through both polarizes. Find ?

9

The focal length of a thin convex lens is . A candle is placed to the left of the lens. Approximately where is the image of the candle?

10

The focal length of a thin convex lens is . A candle is placed to the left of the lens. Approximately where is the image of the candle?

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