What is mean by power of a lens write its si unit a student use lens of focal length 40 cm and other of minus 20 cm write the nature and power of the lens?
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if the focal length is 40 then then the power of lens will be 1/0.4 (D)dioptere
if focal length is 20 cm then power of lens will be 1/-5 diopter
si unit of power is dioptere
the nature of image is real and virtual respectively
if focal length is 20 cm then power of lens will be 1/-5 diopter
si unit of power is dioptere
the nature of image is real and virtual respectively
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