An incident ray is reflected normally by a plan... - WAEC Physics 2001 Question
An incident ray is reflected normally by a plane mirror onto a screen where it forms a bright spot. The mirror and screen are parallel and 1m apart. If the mirror is rotated through 5o, calculate the displacement of the spot
A
8.7cm
B
10.0cm
C
15.4cm
D
17.6cm
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Correct Option: D
tan 10o = (\frac{x}{1})
x = 1 tan 10o = 0.176m
= 17.6cm
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