The far point of a myopic eye is 250 cm. The correcting lens should be a

diverging lens of focal length 250 cm

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

converging lens of focal length 250 cm

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

diverging lens of focal length 125 cm

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

converging lens of focal length 125 cm

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

Open in App

Solution

The correct option is B diverging lens of focal length 250 cm
$u = - \infty$
$v = - 250 c m$
$\frac{1}{v} - \frac{1}{u} = \frac{1}{f}$
$(- \frac{1}{\infty} - \frac{1}{250}) = \frac{1}{f}$
$f = - 250 c m$
The correcting lens of focal length $250 c m$ , since myopic eye is corrected by using a concave lens (which is a diverging lens) of suitable power, thus option $A$ is correct.

Suggest Corrections

Similar questions

Q. A lens of power

+ 2.0 D

is placed in contact with another of power

- 1.0 D

. The combination will behave like

Q. A double convex lens made of a material of refractive index 1.5 and having a focal length of 10 cm is immersed in liquid of refractive index 3.0. The lens will behave as

Q. A converging lens of focal length

40

cm is kept in contact with a diverging lens of focal length

30

cm. Find the focal length of the combination.

Q. A thin converging lens of focal length

25

cm is kept in contact with a thin diverging lens of focal length

20

cm. Focal length of the combination is:-

A person has near point of his vision shifted to 50 cm. What lens must be used to see an object placed at 25 cm from the eye? What is the power of the lens?

Join BYJU'S Learning Program

The far point of a myopic eye is 250 cm. The correcting lens should be a

The correct option is B diverging lens of focal length 250 cmu=−∞v=−250cm1v−1u=1f(−1∞−1250)=1ff=−250cmThe correcting lens of focal length 250cm, since myopic eye is corrected by using a concave lens (which is a diverging lens) of suitable power, thus option A is correct.