Given, power p = 2.5 D
focal length (f) = ?
as weknow that,
f = 1/p
= 1/2.5
=0.4 m
40 cm
Since the focal length is positive , the lens must be a convex lens as convex lens has a positive focal length as we know the nature of the lens.
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Power of lens is 2.5 dioptre, find focal length,type of lens.
Given, power p = 2.5 D
focal length (f) = ?
as weknow that,
f = 1/p
= 1/2.5
=0.4 m
40 cm
Since the focal length is positive , the lens must be a convex lens as convex lens has a positive focal length as we know the nature of the lens.
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