Q6 of 223 Page 179

What is a spherical mirror? Distinguish between a concave mirror and a convex mirror.

Spherical mirror are those mirror whose reflecting surface is the part of a hollow sphere of glass. The two types of spherical mirrors are:

1) concave mirrors


2) convex mirrors



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4

If the focal length of a convex mirror is 28 cm, what is its radius of curvature?

 5

Fill in the following blanks with suitable words:

(a) Parallel rays of light are reflected by a ______ to a point called the principal focus.


(b) The focal length of a concave mirror is the distance from the principal focus to the ____.


(c) A______ converges rays of light whereas a ______ diverges rays of light.


(d) For a convex mirror, parallel rays of light appear to ___ from a point called the principal focus

 7

Name the two types of spherical mirrors. What type of mirror is represented by the:

(a) Back side of a shining steel spoon?


(b) Front side of a shining steel spoon?

 8

What is the relation between the focal length and radius of curvature of a spherical mirror (concave mirror or convex mirror)? Calculate the focal length of a spherical mirror whose radius of curvature is 26 cm.