state SI unit and dimensions of power of lens
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ANSWER....
The SI Unit of power of lens is Dioptre.
A measure of degree of convergence and divergence of light rays falling on it is called power of lens.
it is defined as the reciprocal of its focal length in metres.
P = 1 / f
where,
P = power of lens
f = focal length of lens
One Dioptre - the power of lens is whose the focal length is 1m is called one dioptre.
SOME MAJOR POINTS
1. A lens of short focal length has more power.
2. a length of long focal length has less power.
3. power of convex lens is positive.
4. a power of concave lens is negative.
hope it helps
thanks...
The SI Unit of power of lens is Dioptre.
A measure of degree of convergence and divergence of light rays falling on it is called power of lens.
it is defined as the reciprocal of its focal length in metres.
P = 1 / f
where,
P = power of lens
f = focal length of lens
One Dioptre - the power of lens is whose the focal length is 1m is called one dioptre.
SOME MAJOR POINTS
1. A lens of short focal length has more power.
2. a length of long focal length has less power.
3. power of convex lens is positive.
4. a power of concave lens is negative.
hope it helps
thanks...
IronLearner:
but dimensions
no problem
Answered by
3
A dioptre (British spelling) or diopter (American spelling) is a unit of measurement of the optical power of alens or curved mirror, which is equal to the reciprocal of the focal length measured in metres. (1 dioptre = 1 m−1.) It is thus a unit of reciprocal length.
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