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Name the two kinds of spherical mirrors and distinguish between them.

Reflection of Light

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Answer

Depending on whether the inner or outer surface of the sphere is silvered, spherical mirrors are of two types —

  1. Concave mirror
  2. Convex mirror

Difference between the two mirrors are —

Concave mirrorConvex mirror
It is made by silvering the outer surface of a part of the hollow sphere, so reflection takes place from the inner surface.It is made by silvering the inner surface of a part of the hollow sphere, so reflection takes place from the bulging surface.
The light rays incident on it converge after reflection.The light rays incident on it diverge after reflection.
The image formed by it is real as well as virtual. For all positions of the object at or beyond the focus, the image is real, while for positions of the object between the focus and the pole, the image is virtual.The image formed by it is always virtual for all positions of the object infront of it.
For object away from the centre of curvature, the image is diminished, for object at the centre of curvature, image is of same size and for object within the centre of curvature, image is diminished.The image is always diminished for all positions of the object infront of it.

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