NEET | 2017Geometrical OpticsHard
Question
A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. The beam is reflected back as a spot on a scale placed just above the source I. When the mirror is rotated through a small angle , the spot of the light is found to move through a distance y on the scale. The angle q is given by :-
Options
A.
y/x
B.
x/2y
C.
x/y
D.
y/2x
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