what is the power of an concave lens of focal length 25cm?
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Answered by
15
Focal length of a concave lens is always negative.
P=1/f
So Please =1/-25/100
P=1/-0.25
P=-4.
P=1/f
So Please =1/-25/100
P=1/-0.25
P=-4.
Ksgopika:
Got it?
Answered by
3
Power = 1/f(in m)
= 1/-0.25
=-4 D
= 1/-0.25
=-4 D
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