Question

Q2. (i) Magnification produced by a concave mirror of a body 4cm in size is 0.16. What is the size of image? (ii)Name the type of mirror used in: Support your answer with reason.

(a)Solar furnaces (b)Rear view mirror of a vehicle.

Answer 1

magnification = size of image/size of object

0.16=size of image/4

size of image=0.64cm

a) Concave mirrors are convergent mirrors. That is why they are used to construct solar furnaces. Concave mirrors converge the light incident on them at a single point known as principal focus. Hence, they can be used to produce a large amount of heat at that point.

b) Convex mirror is used in side/rear view mirror of a vehicle. Convex mirrors give a virtual, erect, and diminished image of the objects placed in front of it. Because of this, they have a wide field of view. It enables the driver to see most of the traffic behind him/her.