Question

find the power of a concave lens of focal length 2 m.​

Answer 1

Answer:

The power of the lens, P=f1

Focal length of concave lens, f=−2m

P=−21

Then the power of the lens, P=−0.5 dioptre

The diopter is the unit of measure for the refractive power of a lens. The power of a lens is defined as the reciprocal of its focal length in metres, or P=f1, where P is the power in dioptres and f is the focal length in metres.

Answer 2

Answer:

_0.5d

Explanation:

Is the power

Hi

Hlo

Hi

Hlo