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A lens with focal length -10 cm. Calculate the power of lens. Also , state the nature of lens.

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A lens with focal length -10 cm. Calculate the power of lens. Also , state the nature of lens.


1 Answer


Given, 

focal length f = -10 cm 

= -10/100 m 

= -0.1 m 

power p = ??

We know that the formula for power is 

P = 1/f 

p = 1/- 0.1

p= -10 D

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