A Light Ray Passes from Air Through a Thin Plastic $\degree$

question 81

Multiple Choice

A light ray passes from air through a thin plastic slab (n = 1.3) with parallel sides.If the ray in air makes an angle of 45 $\degree$ with the normal after leaving the slab,what is the angle of incidence for the ray in air as it impinges upon the other side of the slab?

• A)33 \(\degree\)
• B)45 \(\degree\)
• C)67 \(\degree\)
• D)58.5 \(\degree\)

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