An air bubble in water will act like a : (a) convex mirror (b) convex lens (c) concave mirror

The virtual image formed by a concave mirror is always magnified whereas the virtual image formed by a convex mirror is diminished.

By observing the virtual images formed by the three mirrors, we can distinguish between the mirrors as: (i) Plane mirror will produce an image of the same size, (ii) Concave mirror will...

Focal length of the concave mirror does not change because it is about half its radius of curvature and has nothing to do with the external medium. On the other...

(b) concave mirror or convex lens.

(b) concave mirror or convex lens.

(c) both concave mirror and convex lens.

Concave lens is diverging lens

(b) a divergent lens EXPLANATION:  The µ of the convex lens is greater than air so it will act as a convergent lens in the air. When it is dipped in water...

(a) Virtual image formed is larger in size in case of concave mirror.

Focal length of any mirror (concave) does not depend on medium, so it remains unchanged.  If refractive index of the material of convex lens is greater than that of water,...