An object is placed at a distance of 40 cm in front of a concave mirror of focal length 20 cm. The image produced is

Question

An object is placed at a distance of 40 cm in front of a concave mirror of focal length 20 cm. The image produced is (A) real, inverted and smaller in size (B) real, inverted and of same size (C) real and erect (D) virtual and inverted

Tardigrade Admin · Accepted Answer

The given situation is shown below <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/25becd187cf8748a9e7acffacc5b5c09-.png" /> As, focal length, f=-20 cm Radius of curvature, R=2 f=-40 cm This means object is at centre of curvature. So, its image is also formed at centre of curvature which is real, inverted and of same size.

Q. An object is placed at a distance of $40 c m$ in front of a concave mirror of focal length $20 c m$ . The image produced is

real, inverted and smaller in size

real, inverted and of same size

real and erect

virtual and inverted

The given situation is shown below

As, focal length, $f = - 20 c m$
Radius of curvature, $R = 2 f = - 40 c m$
This means object is at centre of curvature.
So, its image is also formed at centre of curvature which is real, inverted and of same size.

Q. An object is placed at a distance of 40cm in front of a concave mirror of focal length 20cm. The image produced is