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Physics
Physics
Problem
A laser beam strikes a plane mirror at
30
∘
30^{\circ}
3
0
∘
from the normal. The mirror is then rotated by
10
∘
10^{\circ}
1
0
∘
about an axis perpendicular to its surface. Which of the following gives the change in direction of the reflected beam? a)
40
∘
40^{\circ}
4
0
∘
b)
10
∘
10^{\circ}
1
0
∘
c)
20
∘
20^{\circ}
2
0
∘
d)
30
∘
30^{\circ}
3
0
∘
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