Question

3. i) Give two uses each of a concave and a convex mirror.

ii) The rear view mirror of a car is a plane mirror. A driver is reversing his car

at a speed of 4 m/s. The driver sees in his rear view mirror the image of a truck

parked behind his car. The speed at which the image of the truck appears to

approach the driver will be

(i) 1 m/s (ii) 2 m/s

(iii) 4 m/s (iv) 8 m/s​

Answer 1

plz mrk me brainliest if answer is satisfied

Explanation:

8 metre

Answer 2

Answer:

i) Concave mirrors...1- for heating purpose:- they are used for converging solar radiations in the solar cookers to generate heat for cooking purpose..

2- as doctors head mirror:- concave mirrors are used by doctors to focus light on the internal body parts such as teeth near nose and throat..

ii) Convex mirror:- 1- Street lighting-street lights also use convex mirrors to diverge light over an extended areas

2) as rear view mirrors:- convex mirrors are used as rear view mirrors in vehicles like cars trucks and buses to see the traffic at the back ....t.q