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AP PHYSICS 123 APP2 Unit 6 Test Review

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APP2 Unit 6 Test Review 1. A layer of oil floats on top of a layer of water. Light traveling from the air strikes the top of the oil, noil=1.48, at an angle of 30°. Some of the light is reflected, some is refracted into the oil. nwater=1.333 a. Determine the angle of reflection that the incident ray makes as the light from the air strikes the oil. b. Determine the angle of refraction of the light as it passes from the air to the oil. c. Determine the angle of incidence that the light must make on the oil/water surface in order for the light to be totally reflected back into oil. d. Determine if the light reflected off the oil/water surface would be totally reflected back into the oil.

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Institution
AP PHYSICS 123
Course
AP PHYSICS 123

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APP2 Unit 6 Test Review




1. A layer of oil floats on top of a layer of water. Light traveling from the air strikes the top of the
oil, noil=1.48, at an angle of 30°. Some of the light is reflected, some is refracted into the oil.
nwater=1.333
a. Determine the angle of reflection that the incident ray makes as the light from the air
strikes the oil.
b. Determine the angle of refraction of the light as it passes from the air to the oil.
c. Determine the angle of incidence that the light must make on the oil/water surface in
order for the light to be totally reflected back into oil.
d. Determine if the light reflected off the oil/water surface would be totally reflected back into
the oil.




2. An object of h height is located f/2 from a concave mirror with a focal point f.
a. Calculate the position of the image. Is it real or virtual?
b. Construct at least two principle rays on the diagram.
c. If the concave mirror was replaced with a plane mirror, calculate the position
of the image. Is it real or virtual?
d. If the concave mirror were replaced with a convex mirror with the same
radius, calculate the position of the image. Is it real or virtual?




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