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Exam 25: Reflection and Refraction of Light

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Question 21

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A light ray strikes a hexagonal ice crystal floating in the air at a 30 $\degree$ angle to one face,as shown below.The hexagonal faces of the crystal are perpendicular to the plane of the page.All the rays shown are in the plane of the page,and n_ice = 1.30.Which outgoing ray is the correct one?

A) A
B) B
C) C
D) D
E) E

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Question 22

Multiple Choice

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A layer of water (n = 1.333) floats on carbon tetrachloride (n = 1.461) contained in an aquarium.To the nearest degree,what is the critical angle at the interface between the two liquids?

A) 88 $\degree$
B) 78 $\degree$
C) 66 $\degree$
D) 58 $\degree$
E) 43 $\degree$

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Question 23

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A layer of ethyl alcohol (n = 1.361) is on top of water (n = 1.333) .To the nearest degree,at what angle relative to the normal to the interface of the two liquids is light totally reflected?

Light is refracted through a diamond.If the angle of incidence is 30 $\degree$ ,and the angle of refraction is 12 $\degree$ ,what is the index of refraction?

The wave front shown at the left for light in air reaches the plane surface (shown by a slanted line) that bounds a medium with n = 1.50. Which diagram below correctly shows the wave front while entering the medium at the right?

A monochromatic (single frequency,single wavelength) light ray in air (n = 1) enters a glass prism (n = 1.5) .In the glass prism

Two mirrors are at right angles to one another.If an object is placed near the mirrors,what is the largest number of images that would be seen in the mirrors?

The actual depth of a shallow pool 1.00 m deep is not the same as the apparent depth seen when you look straight down at the pool from above.How deep (in cm) will it appear to be? (n_water = 1.33. )

A person looks horizontally at the edge of a swimming pool.If its length is 5 m,and the pool is filled to the surface,to what depth (in m) could the observer see? (n for water is 1.33)

A person in a boat sees a fish in the water (n = 1.33) ,the light rays making an angle of 40 $\degree$ relative to the water's surface.What is the true angle (in degrees) relative to the water's surface of the same rays when beneath the surface?

A diver shines an underwater searchlight at the surface of a pond (n = 1.33) .At what angle (relative to the surface) will the light be totally reflected?

Two flat rectangular mirrors are set edge to edge and placed perpendicular to a flat nonreflecting surface.The edges of the two mirrors meet at a 30 $\degree$ angle.A light ray that enters parallel to mirror 2 reflects from mirror 1 and then from mirror 2.The angle of reflection of that ray from mirror 2 is

Light strikes a diamond (n = 2.42) at an angle of 60 $\degree$ relative to the normal to the surface.What is the angle of refraction?

A light ray is incident on the surface of water (n = 1.33) at an angle of 60 $\degree$ relative to the normal to the surface.The angle of the reflected wave is