IT IS A PRESENTATION OF OPTICS POINT

1. PRESENTATION
1.
2.
3.
4.
PHYSICS
POINT
OPTICS
REFLECTION
TYPES OF
REFLECTION
LINEAR
MAGNIFICATION
REFRACTION
 Presented by :Manmohan kumar
 Student at:- S.B.S
polytechnic
college, patti (T.T)

2. Optics is the branch of physics which involves the
behaviour and properties of light, including its
interactions with matter and the construction of
instruments that use or detect it.

3. Reflection of light

4. Types of Reflection
 There are usually two types of reflection depending on
the nature of surface
 (1) Regular reflection (or specular reflection)
 (2) irregular reflection (or diffused)

5. Irregular reflection:-It is the reflection of light from a surface such that an incident ray is
reflected at many angles rather than at just one angle as in the case
of specular reflection.

6. Laws of reflection
 The incident ray, the reflected ray and the normal to the reflection surface at
the point of the incidence lie in the same plane.
 The angle which the incident ray makes with the normal is equal to the angle
which the reflected ray makes to the same normal.
 The reflected ray and the incident ray are on the opposite sides of the normal.

7. Image formation in plane mirror
A plane mirror is a mirror with a planar reflective surface.
For light rays striking a plane mirror, the angle of reflection equals the angle of
incidence. The angle of incidence is the angle between the incident ray and
the surface normal (an imaginary line perpendicular to the surface). Therefore
the angle of reflection is the angle between the reflected ray and the normal
and a collimated beam of light does not spread out after reflection from a
plane mirror,

8. Spherical mirror
A curved mirror is a mirror with a curved reflective surface, which may be
either convex (bulging outward) or concave (bulging inward).
 Convex mirror
Convex mirrors reflect
light outwards, therefore
they are not used to
focus light.
 Concave mirror
Concave mirrors reflect
light inward to one focal
point . They are used to
focus light.

9. LINEAR MAGNIFICATION
 In optics, the size of an image relative to the size of the
object creating it.

10. Sign conventions

11. Refractions
 Refraction occurs when light travels through an area of
space that has a changing index of refraction.