Two Vertical Plane Mirrors Are Joined at a Right Angle

question 59

Multiple Choice

Two vertical plane mirrors are joined at a right angle. A horizontal beam of light is shone on one of the mirrors at an angle of incidence of 22 degrees, such that the reflected ray strikes the other mirror. What is the angle of incidence of the beam that strikes the second mirror?

• A) 23°
• B) 68°
• C) 43°
• D) 22°

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Definitions:

Total Cost

The sum of all expenses, variable and fixed, incurred in producing goods or services.

Average Fixed Cost

The total fixed costs of production divided by the quantity of output produced, typically decreasing as production scale increases.

Average Variable Cost

The total variable costs (costs that change with output level) divided by the quantity of output produced.

AVC

Average Variable Cost; the cost of variable inputs divided by the quantity of output produced.