A small hole P is made in a piece of cardboard. The hole is illuminated by a torch as shown in the figure. The pencil of light coming out of the hole falls on a mirror.
At which point should the eye be placed, so that the hole can be seen?
A
A
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B
B
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C
C
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D
D
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Solution
The correct option is A A Following the laws of reflection, the eye should be placed at A because the hole can be seen only when the angle of incidence is equal to the angle of reflection.