Question

1.Whichofthefollowingcanmakeaparallelbeam oflightwhenlightfrom apointsourceisincidentonit?

(a)Concavemirroraswellasconvexlens

(b)Convexmirroraswellasconcavelens

(c)Twoplanemirrorsplacedat90°toeachother

(d)Concavemirroraswellasconcavele​

Answer 1

Answer:

I think your answer should be option A....but I am not sure....