Question

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Figure (18-Q2) shows two rays A and B being reflected by a mirror and going as A' and B' . The mirror is


(a) is plane

(b) is convex

(c) is concave

(d) may be any spherical mirror.



NOTE :- ALSO EXPLAIN REASON


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Answer 1

Answer:

a) Plane Mirror

We can see in the figure that the light rays got reflected but without converging or diverging

This can only happen in the case of plane mirror...the light rays were parallel before reflection and after reflection as well.

If it would have been some sort of spherical mirror, then the rays must have been converged or diverged depending on the nature of the mirror

a concave lens diverges the light ray while a convex lens converges the light ray

Plane mirror neither diverges nor converges

ALSO the size of the image formed is same as before

again, proving that the rays have been reflected by a plane mirror.

Answer 2

Answer:

a) is plane

Explanation:

The parallel rays after reflection are still parallel, which is possible only in a plane mirror. Concave or convex mirrors either converge or diverge the parallel rays. Hence the option (a) is correct.