Question 1
Define 1 dioptre of power of a lens.

Open in App

Solution

A dioptre is a unit of measurement of the optical power of a lens or curved mirror, which is equal to the reciprocal of the focal length measured in metres (i.e., 1/metres). It is thus a unit of reciprocal length. In other words,1 dioptre is defined as the power of a lens of focal length 1 metre.

Suggest Corrections

Similar questions

Q. Define 1 dioptre power of a lens.

Q. Question 1
Define 1 dioptre of power of a lens.

Question 8
Which of the following statements is true?
(a) A convex lens has 4 dioptre power having a focal length 0.25 m.
(b) A convex lens has -4 dioptre power having a focal length -0.25 m.
(c) A concave lens has 4 dioptre power having a focal length 0.25 m.
(d) A concave lens has 4 dioptre power having a focal length -0.25 m.

Q. 1 dioptre is the power of a lens whose focal length is:

Q. The power of three lenses A, B, and C are 1, 2 and 3 dioptre respectively. What is the power of the combination of these lenses?

Join BYJU'S Learning Program

Question 1 Define 1 dioptre of power of a lens.

A dioptre is a unit of measurement of the optical power of a lens or curved mirror, which is equal to the reciprocal of the focal length measured in metres (i.e., 1/metres). It is thus a unit of reciprocal length. In other words,1 dioptre is defined as the power of a lens of focal length 1 metre.

Question 1
Define 1 dioptre of power of a lens.