what is the focal length of a lens ,whose power is given as +2.0 D ??
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Answered by
5
power=1/f
2=1/f
2f=1
f=1/2=0.5
0.5=50cm
thus the focal length of the covex lens(because power is positive) =50 cm
2=1/f
2f=1
f=1/2=0.5
0.5=50cm
thus the focal length of the covex lens(because power is positive) =50 cm
Answered by
5
Explanation:
Power of lens, P= 1/f
P= -2D
f= -1/2 = -0.5 m
A concave lens has a negative focal length. Hence, it is a concave lens.
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