Find the position and nature of the image formed by the concave mirror of focal length $20 cm$ , if the object $O$ is placed at a distance $30 cm$ from the pole.

- 60 cm

, Virtual image

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

+ 60 cm

, Real image

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

- 60 cm

, Real image

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

+ 60 cm

, Virtual image

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

Open in App

Solution

The correct option is C $- 60 cm$ , Real image
Given:
$u = - 30 cm$
$f = - 20 cm$
So, $\frac{1}{v} + \frac{1}{u} = \frac{1}{f}$
$\Rightarrow \frac{1}{v} - \frac{1}{30} = \frac{- 1}{20}$
$\Rightarrow \frac{1}{v} = \frac{- 1}{60}$
$\Rightarrow v = - 60 cm$
As the image is formed on the same side of the concave mirror, the image is real.

Suggest Corrections

Similar questions

Q. A 5 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 20 cm. The distance of the object from the lens is 30 cm. Find the position and nature of the image formed.

An object is placed infront of a converging lens of focal length $20 c m$ . The distance of the object from the lens is $30 c m$ . Find:
1. the position of the image formed,
2. the magnification and
3. the nature of the image formed.

Focal length of convex lens is 20 cm, focal length of concave mirror is 30 cm. And the separation between lens and mirror is 90 cm. If the object is placed 60 cm before lens, find out position of image formed by concave mirror?

The focal length of a convex lens is $20 c m$ , the focal length of the concave mirror is $30 c m$ . And the separation between lens and mirror is $90 c m$ . If the object is placed $60 c m$ before the lens, find out the position of an image formed by the concave mirror?

Q. An object of height

1.2 m

is placed before a concave mirror of focal length

20 c m

so that a real image is formed at a distance of

60 c m

from it. Find the position of an object. What will be the height of the image formed?

Join BYJU'S Learning Program

Find the position and nature of the image formed by the concave mirror of focal length 20 cm, if the object O is placed at a distance 30 cm from the pole.

The correct option is C −60 cm, Real imageGiven: u=−30 cm f=−20 cm So, 1v+1u=1f ⇒1v−130=−120 ⇒1v=−160 ⇒v=−60 cm As the image is formed on the same side of the concave mirror, the image is real.

Find the position and nature of the image formed by the concave mirror of focal length $20 cm$ , if the object $O$ is placed at a distance $30 cm$ from the pole.