Two people are each standing 3.0 m in front of a large plane mirror and are spac

Question

Two people are each standing 3.0 m in front of a large plane mirror and are spaced 6.0 m apart. At what angle of incidence should one of them shine a flashlight on the mirror so that the reflected beam will strike the other?

Standing 2.5 m in front of a plane mirror with your camera, you decide to take a picture of yourself without turning the camera around. To what distance should the camera be focused to get a sharp image?


A dog is sitting in front of a plane mirror. At a command it jumps at the mirror with a speed of 0.50 m/s. How fast does the dog approach its image?

Explanation / Answer

a. tan(theta) = 3/3 theta = 45 degrees b. object d =image d = 2.5m c. v=.50(2)= 1m/s

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