When a ray of light approaches a smooth polished
surface and the light ray bounces back, it is called the reflection of light.
Incident
ray
The
ray that is incident on a surface is incident ray.
Reflected
ray
The
ray that is coming from the surface after reflection is reflected ray.
Normal
If
a perpendicular were to be drawn on reflecting surface, it would be called
normal.
Angle of incidence
Angle of reflection
Angle of reflection is the angle between reflected ray and the normal.
Angle of incidence
Angle of incidence is the angle between incident ray
and the normal.
Angle of reflection is the angle between reflected ray and the normal.
LAWS OF REFLECTION
There are two laws of
reflection
FIRST LAW OF REFLECTION:
SECOND LAW OF
REFLECTION:
According to the second law of
reflection, the angle of incidence is always equal to the angle of reflection
for small angles.
The laws of reflection are applicable to spherical
mirrors as well.
Activity
Complete
the table
Serial
Number
|
Angle of
incidence (i)
|
Angle of
reflection(r)
|
1
|
300
|
|
2
|
400
|
|
3
|
550
|
|
4
|
75
|
No comments:
Post a Comment