Class 12

Ray Optics and Optical Instruments question bank (Physics)

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Q1.

What should be the angle between two plane mirrors so that whatever be the angle of incidence,the incident ray and the reflected ray from the two mirrors are parallel to each other (in $^o$)?

(A)

$60$

(B)

$90$

(C)

$120$

(D)

$175$

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Q2.

It is desired to photograph the image of an object placed at a distance of $3\;m$ from a plane mirror. The camera,which is at a distance of $4.5\;m$ from the mirror,should be focused for a distance of......$m$.

(A)

$3$

(B)

$4.5$

(C)

$6$

(D)

$7.5$

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