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Homework 13
1.
Two 3.0 metertall planar mirrors are placed facing and parallel to
each other 0.75 m apart. If a ray of light just passes the bottom edge
of one mirror and strikes the other at an incident angle of 10
°
, how
many reflections will the light make before exiting this "hall"?
2.
A bartender keeps an eye on her customers while her back is turned
by way of a mirror mounted behind the bar. The mirror is 0.580 m
wide and she is standing 0.750 m from it. How wide an expanse of the
parallel wall opposite the mirror can she see in the mirror if the
opposite wall is 6.00 m away from the mirror?
3.
Use the mirror equation to show that for a planar mirror, the
magnitude of the image distance equals the magnitude of the object
distance. Hint: A planar mirror can be thought of as a spherical mirror
with an infinite radius of curvature.
4.
A mirror produces an inverted image 2.80 cm tall when a 5.60 cm tall
object is 25.0 cm away from it. (a) What is the image distance? State
your answer with the correct sign. (b) What is the focal length of the
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 Spring '08
 Ye
 Magnetism, Work, Light

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