A flat mirror M is arranged parallel to a wal | vedclass

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Question

(D) Since the mirror $M$ is perfectly parallel to the wall $W$,the angle of incidence for any light ray from the point source $S$ remains constant as

Vedclass · Accepted Answer

Both $(B)$ and $(C)$.

Vedclass · Answer

(D) Since the mirror $M$ is perfectly parallel to the wall $W$,the angle of incidence for any light ray from the point source $S$ remains constant as the mirror moves towards the wall. Because the mirror moves parallel to itself,the reflected ray path does not change its direction relative to the wall. Therefore,the position of the light spot on the wall remains stationary. Additionally,since the source $S$ is a point source,the reflected light forms a point image on the wall. As the mirror moves,the geometry of the reflection does not change,so the size of the light spot remains a point (i.e.,it remains the same). Thus,both statements $(B)$ and $(C)$ are correct,making $(D)$ the final answer.

$A$ flat mirror $M$ is arranged parallel to a wall $W$ at a distance $l$ from it. The light produced by a point source $S$ kept on the wall is reflected by the mirror and produces a light spot on the wall. The mirror moves with velocity $v$ towards the wall.

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