Question 8:
Name the type of mirror used in the following situations.
(a) Headlights of a car
(b) Side/rear-view mirror of a vehicle
(c) Solar furnace
Support your answer with reason.
Answer:
(a) Concave (b) Convex (c) Concave
Explanation
(a) Concave mirror is used in the headlights of a car. This is because concave mirrors
can produce powerful parallel beam of light when the light source is placed at their
principal focus.
(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.
(c) 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.
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