The power of lens is 5d its focal length is
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Power of lens is +5D . find focal length
Answered by admin @
Hey User !!!
P = + 5 D
Power = reciprocal of focal length in metres
P = 1/f
f = 1/P
f = 1/5 = 0.2 m
0.2m to cm
0.2 × 100 = 20 cm
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