A ray from a fixed object is incident on a plane mirror at an angle...

WAEC 2006

A ray from a fixed object is incident on a plane mirror at an angle of 20^o. If the mirror is rotated through 30^o by how many degree would the reflected ray rotate?

A. 60^o
B. 50^o
C. 40^o
D. 30^o

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Correct Answer: Option A

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