Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

General Knowledge

Topic

Physics

Question:

Which of the following is true for power of a concave lens?

Options:

Power of a concave lens is always positive

Power of a concave lens is always negative

Power of a concave lens is zero

Power of a concave lens is infinite

Correct Answer:

Power of a concave lens is always negative

Explanation:

Power of a lens, P = \(\frac{1}{f}\)

where f is in metres.

Focal length of concave lens is always negative

Hence, Power of concave lens is also negative.