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

1 cm

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1 km

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1 mm

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1 m

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D 1 m
Given, power = 1 D
$F o c a l l e n g t h = \frac{1}{P o w e r}$
$f = \frac{1}{1} = 1 m$

Suggest Corrections

Similar questions

Q. The power of a lens whose focal length is one metre is ______ dioptre.

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. A focal length of a lens is 10 cm. What is power of a lens in dioptre?

Q. A convex lens of power

+ 6

dioptre is placed in contact with a concave lens of power

- 4

dioptres. What will be the nature and focal length of this combination?

Q. A myopic person has a power of -1.25 Dioptre. What is the focal length and nature of his lens?

Join BYJU'S Learning Program

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

The correct option is D 1 mGiven, power = 1 D Focal length=1Power f=11=1 m

The correct option is D 1 m
Given, power = 1 D
$F o c a l l e n g t h = \frac{1}{P o w e r}$
$f = \frac{1}{1} = 1 m$