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
$(b)$. B
$(c)$. C
$(d)$. D"

As the angle of incidence is equal to the angle of reflection. So, the eye should be placed at point A.

Therefore, option $(a)$ is correct.

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Updated on: 10-Oct-2022

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