Question

find the power of cocave lens of focal length 2 meter
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Answer 1

Answer:

-0.5

Explanation:

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Answer 2

Answer:

-0.5D

Explanation:

A concave lens has negative focal length, so it is to be written with a minus sign. Thus, Focal length, f = -2

power = 1/f

P= -1/2

P= -0.5D