Question

20 A convex mirror is a spherical reflecting surface in which its bulging side faces

the light source. There are numerous uses of convex mirror which is also

referred as fish eye mirror by automobile enthusiasts and diverging mirror by

physicists.

The convex mirror always forms a virtual image of the object and the image

formed by the convex mirror is smaller than the size of the actual object.

Therefore, the most common convex mirror uses are in places where bigger

objects are to be viewed in a smaller size. Since convex mirrors have a wider

view field than concave mirrors and plane mirrors, they are mostly used in side

mirrors of automobiles. Some of the most vital and common uses of convex

mirror are: Large offices, stores, and hospitals use convex mirror to let people

see around the corner so that they can avoid running into each other and prevent

any collision. One of the most common uses of convex mirror is for making

sunglasses. The convex mirror reflects the sunlight away from the person’s eye

wearing the sunglass. Convex mirrors are widely used as rear view mirrors in

automobiles and vehicles because it can diverge light beams and make virtual

images. Convex mirrors are widely used for making magnifying glasses. In order

to make a magnifying glass, two convex mirrors are placed back to back.

Convex mirrors are also used for security purposes in various places. They are

places near ATM’s so that bank customers can check if someon20 (iii) Find the focal length of the convex mirror if its radius of curvature is 30cm.

20 (iv) Magnification produced by the Convex Mirror is

I. Positive and less than one

II. Negative and less than one

III. Positive and greater than one

IV. Positive and less than one

20 (v) Convex mirrors are used as rear view mirrors in vehicles because

(a) They cover larger distance

(b) They cover wider field of view

(c) They cover larger distance and wider field of view

(d) They form real image​

Answer 1

Explanation:

20 . IV. option ll

v.option.c