Does the focal length of a concave mirror change when immersed in water?

The focus of a concave mirror is situated at a distance which is half of the radius of curvature of the mirror. When kept inside water, the laws of reflections are still valid, thus the focal length of the concave mirror does not change.

What will be the change in focal length of a concave mirror when immersed in a liquid of refractive index n?

In case of spherical mirrors (both concave and convex), there will be no change in the focal length of the mirrors when immersed in water. This is because the focal length of mirrors does not depend on the external medium in which it is held.

When a concave mirror is held underwater assertion?

Assertion : When a concave mirror is held under water, its focal length will increase. Reason : The focal length of a concave mirror is independent of the medium in which it is placed.

When a concave lens made of glass is immersed in water it becomes?

Complete answer: When a lens is submerged in water, the focal length increases, and as focal length is inversely related to angular magnification, the power of the lens diminishes or decreases.

Which mirror can form a real image?

concave mirror
Only a concave mirror is capable of producing a real image and this only occurs if the object is located a distance greater than a focal length from the mirror’s surface.

Can convex and concave mirror form a real image?

Plane mirrors and convex mirrors only produce virtual images. Only a concave mirror is capable of producing a real image and this only occurs if the object is located a distance greater than a focal length from the mirror’s surface.

When a concave mirror is held towards the sun?

(a) The spherical mirror is concave. (b) A hole is burnt in the carbon paper, because a concave mirror converges light rays, and in this case, it converges a lot of heat rays coming from the sun and concentrates at the point of the sun’s image which burns the hole in carbon paper.

What changes in the focal length of a concave mirror and convex lens occur?

The object distance and the image distance will change when the refractive index of the medium is changed. The focal length only depends on the radius of curvature, but not on any other factor.

When a concave mirror is held?

The focal length of a concave mirror does not depend on the nature of the surrounding medium. So, there won’t be any change in the focal length of the concave mirror when, held in water. An object of size 7.0 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm.