Question

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

Answer 1

Explanation:

Given that, Focal length of the concave lens, f = 2 m.

To find, Power of the lens.

Solution, The relation between power and focal length of the lens is inverse. Power is given by : P = 1/f.

f is the focal length of the lens and it is negative for concave lens.

Answer 2

Answer:

Focal length =2m

Power of lens = 1/focal length

=1/2=+0.5D

Explanation:

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