# The Focal Length of a Lens of Power +4 D will be

- +0.50 meter
- -0.25 meter
- +0.25 meter
- -0.50 meter

The Focal length of a lens of power +4D will be** +0.25 meter.
Definition of Focus lens**:-

Focal length is the distance between the center of a concave lens or a concave mirror and the focal point of the lens or mirror. The focal length is always positive.

Power of lens = +4D

Focal length =?

Formula of focal length—

Focal length = 1 / power of lens.

Then,

Focal length = ¼

= **+0.25 meter.**

Hence, the focal length of a lens of power +4D will be +0.25 meter.