# 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"

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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.

Updated on 10-Oct-2022 13:29:40