Question

define the following terms :
(a) incident ray
(b) reflected ray
(c) normal at the point of incidence
(d) angle of incidence
(e) angle of reflection

Answer 1

(a) Incident ray: This is the ray of light that falls on the mirror surface.

(b) Point of incidence: This is the point at which the incident ray falls on the mirror.

(c) Normal: The line at right angle to the mirror surface at the point of incidence is called normal.

(d) Reflected ray: The ray of light which is reflected back by the mirror is called the reflected rays.

(e) Angle of incidence: The angle made by the incident ray with the normal at the point of incidence is called angle of incidence.

(f) Angle of reflection: The angle made by the reflected ray with the normal at the point of incidence is called angle of reflection.

Answer 2

Answer:

a.incident ray:the ray of light that falls on the reflecting surface is called incident ray.

b.point of incidence: the point at which the incident ray strikes the reflecting surface of the mirror is called point of incidence.

c. Reflected ray:The ray of light which is sent back after reflection by the mirror is called reflected ray.

d.normal:It is a line at right angle to the mirror surface at the point of incidence.

e.Angle of incidence: the angle that the incident ray makes with the normal at the point of incidence is called angle of incidence.

f. Angle of reflection: The angle that the reflected ray makes with the normal at the point of incidence is called the angle of reflection.