Question

Both spherical mirror and thin spherical lens have a focal length of + 20 cm what type of mirror and lens are these? *

Convex mirror , concave lens

Convex mirror , convex lens

Concave mirror ,convex lens

Concave mirror , concave lens

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Answer 1

Answer:

c

Explanation:

option c is right answer.....

Answer 2

Answer:

Explanation:

. A lens having both the spherical surfaces curved

inwards is a concave lens.