Correct Answer - Option 1 : [360/θ] - 1
CONCEPT:
-
Plane mirror: It is a mirror with a flat (planar) reflective surface.
- For light rays striking a plane mirror, the angle of reflection equals the angle of incidence.
- The angle of the incidence is the angle between the incident ray and the surface normal
- If the image of an object is viewed in two plane mirrors that are inclined to each other, more than one
image is formed.
- The number of images depends on the angle between the two mirrors.
⇒ Number of images =[360/θ − 1]
where θ is an angle between the two incline mirrors
- The first mirror was made by German Scientist Justus von Liebig. He coated the plane surface of a piece
of ordinary glass with silver metal for making this mirror. Such a mirror is called a silvered glass mirror.
-
Concave mirror: If the inner surface of the spherical mirror is the reflecting surface.
-
Convex mirror: If the outer surface of the spherical mirror is the reflecting surface.
|
Angle
|
Number of images formed (n)
|
|
30°
|
11
|
|
45°
|
7
|
|
60°
|
5
|
|
120°
|
2
|
|
180°
|
1
|
|
0°
|
Infinite
|
