Acids, Bases and Salts

Question

What is a spherical mirror? What are the two different types of spherical mirrors?

Answer

Spherical mirror is a mirror whose reflecting surface is a part of a hollow sphere. The reflecting surface of the spherical mirrors may be curved inwards or outwards. 

In Fig, S is a hollow glass sphere being cut by a plane AB. The section LPM of this spherical shell cut by the plane, forms a part of the sphere and is known as spherical surface. 

If either side of this spherical surface is silvered, we get a spherical mirror. 



Spherical mirrors are of two types:

(i) Concave mirror: A spherical mirror, whose reflecting surface is curved inwards i.e., towards the centre of the  the sphere is called as concave mirror. Concave mirror is silvered on the outer bulged surface and reflects light from the hollow inner surface. Figure (b) shows us a concave mirror. 

(ii) Convex mirror: A spherical mirror is convex if it is silvered on the inner hollow surface and reflects light from the outer bulged surface. The reflecting surface of the convex mirror is curved outwards. Figure (c.) shows us the diagram for a convex mirror.



Sponsor Area