A Light Ray Passes from Air Through a Thin Plastic

question 24

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 67° 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°
• B) 67°
• C) 58.5°
• D) 45°

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Definitions:

Interest Forgone

The potential interest one could have earned on their money if it had been invested rather than spent or kept in a non-interest-bearing account.

MC (Marginal Cost)

The additional cost resulting from the production of one more unit of a product or service.

ATC (Average Total Cost)

The total cost of production divided by the quantity of output produced, representing the per-unit cost of production.

MR (Marginal Revenue)

The increment in revenue that results from the sale of one additional unit of a product or service.