Question

find the power of a concave lens of focal length 2m​

Answer 1

Answer:

Focal length =2m

Power of lens =focallength1

=21=+0.5D

Answer 2

Answer:

focal length of a concave lens is , f = - 2m

•°• power = 1/f

= 1/(-2)

= -0.5 D

Explanation:

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