This document discusses the properties of light reflection and image formation using mirrors. It describes the laws of reflection and different types of mirrors. Concave mirrors focus parallel light rays to a focal point, while convex mirrors cause parallel rays to diverge from a virtual focal point behind the mirror. The focal length of a mirror is half its radius of curvature. The position and features of images formed by mirrors are described for different positions of the object.

1. THE PATH OF LIGHT

2. Laws of reflection
 The incident ray, the reflected ray and the normal to
the plane of the reflection drawn are in the same
plane.
 The angle of incidence is equal to the angle of
reflection.

3. Different types of mirrors
If the reflecting surface of the mirror
curves outward, it is a convex mirror.
If it curves inward, it is a concave
mirror.

6. FOCUS
The light rays falling parallel to the
principle axis of a concave mirror
converge at a point on the principal
axis. This point is the principal focus
of the concave mirror.

7. Focus of concave and convex mirrors

8. Focus of a convex mirror
 The light rays falling parallel to the
principal axis of a convex mirror diverge
from a point on the principal axis after
reflection. This point is the principal
focus of the convex mirror. Since this is
not real, this is a virtual focus.

9. Focal length
The distance from pole to focus is
the focal length.
This will be equal to half the radius
of curvature (R),
f= R/2

10. Image formation

11. Sl
no
.
The position
of the object
The position of
the image
Features of
the image
1 Beyond C Between C and F Small, inverted,
real
2 At C At C Same size,
inverted, real
3 Between C and F Beyond C Large, inverted,
real
4 At F Image on infinity -
5 Between F and P Behind the mirror Large, virtual

12. THANK YOU