Question

power of a lens is equal to its focal length (is true or false)​

Answer 1

Answer:

True

Explanation:

True if power of lens is equal to its focal length when focal length is 1 meter.

Answer 2

Answer:

false

Explanation:

power of length is equals to reciprocal of focal length

It is equal to the reciprocal of the focal length of the device p=1/f. High optical power corresponds to short focal length. The SI unit for optical power is the inverse metre m

−1

, which is commonly called the dioptre. Converging lenses have positive optical power , while diverging lenses have negative power .