This document discusses the concepts of light reflection. It defines reflection as light bouncing back when striking a surface. There are two types of reflection: regular and irregular. Regular reflection occurs on smooth surfaces, keeping parallel rays parallel after reflection. Irregular reflection on rough surfaces scatters rays in different directions. The document also discusses laws of reflection, types of images (real and virtual), characteristics of images formed by plane and spherical mirrors, and key terms like focal length, radius of curvature, and principle axis.

1. // JAY SHREE GANESH //
WELCOME

3. LIGHT
REFLACTION

4. What is light-:
Light is the form of
energy which enable us
to see the things around
us.

5. REFTECTION-:
It is the phenomena of
bouncing back of Light by
striking the surface

6. There are two types of
reflection-:
 Regular Reflection
 Irregular reflection

7.  Regular Reflection
When the reflection surface is
smooth than parallel raw
falling on it are parallel to
each other by refection

8.  Irregular Reflection
When reflecting surface is rough
than the parallel raw falling on it
are reflected in different
direction.

9. Lays of Reflection-:
 Incident raw, reflected raw
and normal raw lie in same
plan.
Angle of reflection is
always equal to angle of
Incident (<I = <r)

10. Types of Image-:
 Real Image
 virtual Image

11.  Real Image
When ray of light meet actually
at any point after reflection that
the image is real. A real image
can be seen on a screen

12. Virtual Image
When a ray of light
appears to meet after
reflection then such
image called virtual
image.

13. Characteristic
image of
Formed
by image

14.  Size of image is always same as the size of object.
 Virtual and erect.
 The distance of image from the mirror is equal to the distance of
object from the mirror.
 The distance of image from mirror is literally inverted that means
left side of object become the right side of image and ysaversa .

15. This Photo by Unknown Author is licensed under
CC BY-SA
This Photo by Unknown Author is licensed under CC BY
Convex mirror
Concave mirror

17. Centre of culvature
It is the centre of
heliosphere of glass,
of which the
spherical mirror is a
part.

18. Pole-:
It is the centre of spherical mirror
represented by ‘p’.

19. Principle Axis
It is the straight line passes through the centre of
curvature and pole of sparical mirror.

20. Radius of
curvature
It is the radius of heliosphere of which the spherical
mirror is a part represented by “r”

21. Aperture
Aperture of spherical mirror is the
diameter of reflecting surface of
mirror

22. Focal length
 The point at which light rays parallel to the principle axis
meat or appears to meat after reflation to the mirror is
called principle fucus.
 The distance between focus and pole of the mirror is
called focal length it is represent by “f”.
 Focal length of curve spherical mirror is always half of
radius of curvature

23. Sign Convention
 All the distances are measured from pole of the
mirror
 The distances measured in the direction of incident
light are taken as positive and direction in the
opposite to incident light taken as negative.
 If the object is placed on the left side of mirror then
the distance on the left side are taken as negative
and the distance on the right side taken as positive.
 Hight measured upward are taken as positive and
hight measured downward taken as negative.