Zhainab Zhainab

20-03-2021
Physics

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Find the focal length of a lens of power-2.0D . What type of lens is this ?

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20-03-2021

Answer: f = - 0.50 m, negative (diverging) lens

Explanation: D-value (diopter ) means 1/f, unit is 1/m. Thus -2.0D

Means f = ( 1/ -2.0 ) m = -0.50 m

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