Question

1) What do you understand by reflection of light? Give two laws of reflection.

2) Which metal is the best reflector of light?

3) What are the values of angle of incidence (i)and that of

Reflection(r) for a normal incidence.

4) Describe the following terms in relation to a plane mirror.

a) point of incidence

b) Incident ray

c) Reflected ray

d) Normal

e) Angle of incidence

f) Angle of reflection

6) What is the angle of reflection if a ray falls normally on a plane?

Mirror.

Answer 1

1)The return of light in the same medium after striking a surface is called reflection.
Laws of reflection
1) The angle of incidence is equal to the angle of reflection.
2)The incident ray reflected ray and the normal at the point of the incidence lie in the same place .

Answer 2

a) the bouncing back of light from the surface of object . law are angle i is = angle r
b) smooth and shiny surface
3) normal is 90 digree