Science, asked by fahadqureshi931182, 1 day ago

39. If a lens can converge the sun rays at a point 20 cm. away from its optical centre, the power of this lens is - (a) + 2D (b), - 2D (d) - 5D - + 5D -

Answers

Answered by riyasahaya

3

Answer:

+5D

Explanation:

P=100/f (in cm)

=100/20

=+5D

+5D because it is convex lens

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