The power of a lens is 2.5D What is The focal length and nature of lens?
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Answered by
6
2.5 +ve indicates that it is convex lens
and
power =1/f
f =10/25
= 2/5 or 0.4m
and
power =1/f
f =10/25
= 2/5 or 0.4m
Answered by
0
Answer:
Power = +2.5 D
F = 1/P = 1/2.5 = 0.4m = +40cm
Focal length is 40cm and it is a convex lens.
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