In what S.I. units is the power of lenses stated? A convex lens has a focal length of 50 cm. Calculate its power.
Answers
Answered by
27
"The standard unit of power of lenses is Dioptres. It is related with the focal length of the lens as P= 1/ focal length of the lens.
Therefore if the focal length of the lens is 50cm, then the power of the lens is given as 1/50 Dioptres, which comes as 0.02 Dioptres.
Therefore the net power of the lens can be expressed as 0.02 D.
"
Answered by
14
Answer:"The standard unit of power of lenses is Dioptres. It is related with the focal length of the lens as P= 1/ focal length of the lens.
Therefore if the focal length of the lens is 0.5m, then the power of the lens is given as 1/0.5 Dioptres, which comes as 2 Dioptres.
Therefore the net power of the lens can be expressed as 2 D.
Similar questions