Question

find the power of convex lens of focal length 50cm​

Answer 1

Answer:

Given:

Convex lens of focal length 50 cm is given.

To find:

power of the lens

Definitions:

It is defined as the capability of a lens to converge and diverge the light rays falling on it.

Power for Concave lens is negative.

Power of Convex Lens is positive.

Formulas used:

Power = 1/focal length (in metres)

Calculation:

50 cm = 0.5 m

Power = 1/0.5

=> power = 2 D.

Answer 2

Explanation:

P= 100/f. {100/f to convert the f from

cm to m.}

P = 100/50

P = 2 D

As the power of convex lens is positive. So P =+2 D