Whichofthefollowingcanmakeaparallelbeamoflightwhenlight
fromapointsourceisincidentonit?
(a)Concavemirroraswellasconvexlens
(b)Convexmirroraswellasconcavelens
(c)Twoplanemirrorsplacedat90°toeachother
(d)Concavemirroraswellasconcavelens
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Answer:
(B) COMVEX MIRROR AS WELL AS CONCAVELENS
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