INTRO, CAUSE OF REFRACTION, LAWS OF REFRACTION, REFRACTIVE INDEX, APPLICATION OF REFRACTIVE INDEX, CRITICAL ANGLE, TOTAL INTERNAL REFLECTION.

1. REFRACTON OF LIGHT
- S.RAJARAJESWARI

2. REFRACTION OF LIGHT
Refraction is the bend of the path of a light
ray as it passes from one transparent
medium to another .

3. CAUSE OF REFRACTION
• The change in the speed of light as it
passes from one medium to another,
causes refraction of light.

4. • Incident ray: A ray of light hits on the
surface separating two mediums is the
incident ray.
• Refracted ray: When an incident light
ray passes through second medium and
changes it's direction the ray is said to
be a refracted ray.
• Angle of incidence :The angle between
the incident ray and the normal
• Angle of reflection : The angle
between the reflected ray and the
normal

6. LAWS OF REFRACTION OR
SNELL’S LAW
• The incident ray, the
normal and the
refracted ray at a
point of incidence all
lie in the same plane.
• The ratio of the sine
of the angle of
incidence to the sine
of the angle of
refraction is constant.

7. REFRACTIVE INDEX
• Refractive index describes how fast a
can light travels through the material.
• It is dimensionless
• Refractive index is the ratio between the
speed of light in a vacuum (c) and the
speed of light in the medium (v).
• n=c/v

8. REFRACTIVE INDEX OF MATERIALS

9. REFRACTION APPLICATION
• Rainbow: when rainfall occurs,that arc
of light spectrum is possible because
of internal refraction of sunlight in
water droplets.

10. • Diamond shine - The light waves
passes through the surface of
diamond only to be refracted back to
us which makes diamond shine.