powerof cancave lens is 45D.find its focal length?
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p=1/f =1/45 dude this ur answer
Anonymous:
got it or not?
Answered by
1
hey bud.. if it is a concave lens so its power is negetive so, -45 D
now , p = 1 / f
so , f = 1 / p
f = 1 / -45 = -0.022 m
f = -2.2 cm
hope it will helps u !!!!
now , p = 1 / f
so , f = 1 / p
f = 1 / -45 = -0.022 m
f = -2.2 cm
hope it will helps u !!!!
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