some important term regarding reflection ?
Answers
( i ) Ray of light
A straightline path along which the transfer of light energy takes place is called a ray of light . It is represented by a straight line with arrow marked on it . The arrow shows the direction of ray .
( ii ) Incident ray
The light ray coming towards the reflecting surface is called incident ray . In the figure , AO is incident ray .
( iii ) Point of incidence
It is the point at which incident ray strike the reflecting surface ( MM ) . In the figure the point 0 is called point of | incidence .
( iv ) Reflected ray
The light ray going back after reflection is called reflected ray . In the figure , OC is relfected ray .
( v ) Normal
The perpendicular on the point of incidence is called normal . In the figure ON is normal .
( vi ) Angle of Incidence
The angle between the | incident ray and normal is called angle of incidence . In the figure , angle AON is angle of incidence , represented by i .
( vii ) Angle of reflection
The angle between normal and reflected ray is called anjle of reflection . In the figure angle NOC is angle of reflection represented by r .
- The angle of reflection is always equal to angle of incident ray.
- The Reflected ray,the normal and incident ray all lies on the same plane
