Question

Find the focal length of a concave lens of power -2D

Answer 1

Answer:

so focal length should be equal to 2 meters. gonna be firm Rafferty power powers equal to the reciprocal of the focal length is equal to 1 by there it will be equal to minus 1 by 2 the focal length or a concave lens. negative so minus 2 meter 1 by 2 that is equal minus. 0.

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Answer 2

i hope it helps u.....!!!