REFRACTION OF LIGHT THROUGH PLANE SURFACE 1) REFRACTION 2) OPTICAL MEDIUM 3) LAWS OF REFRACTION 4) REFRACTIVE INDEX 5) REFRACTION OF LIGHT THROUGH GLASS SLAB

1. RFEFRACTION OF LIGHT
THROUGH PLANE SURFACE

2.  WHEN LIGHT PASSES FROM ONE MEDIUM TO ANOTHER MEDIUM IT CHANGES
DIRECTION
OR
 BENDING OF LIGHT RAY WHEN IT PASSES FROM ONE MEDIUM TO ANOTHER
MEDIUM

3. 3 × 108ms-¹
2 × 108ms-¹
2 × 108ms-¹
3 × 108ms-¹

4. DENSER MEDIUM
∟i
∟r

5. MEDIUM ARE OF TWO TYPES
1 OPTICALLY RARER MEDIUM
2 OPTICALLY DENSER MEDIUM

6.  OPTICALLY RARER MEDIUM : SPEED OF LIGHT
IS MORE
 EX : AIR
 OPTICALLY DENDER MEDIUM : SPEED OF
LIGHT IS LESS
 EX : GLASS
 WATER
3 × 108ms-¹
2 × 108ms-¹
2.25 × 108ms-¹

7. 3 × 108ms-¹
2 × 108ms-¹

9. ∟i = 0
∟r = 0

10. RARER MEDIUM TO DENSER
MEDIUM
DENSER MEDIUM TO RARER
MEDIUM
3 × 108ms-¹
3 × 108ms-¹
2 × 108ms-¹
2 × 108ms-¹

11. i) The incident ray, the refracted ray and the normal to
the interface of two transparent media at the point of
incidence, all lie in the same plane.
II) The ratio of the sine of angle of incidence to the
sine of angle of refraction is a constant, for the light of
a given colour and for the given pair of media.( This law
is also known as Snell`s law of refraction.)
Sin i/sin r = constant= µ(refractive index)

13. ∟i = ∟
∟r = ∟

14. Absolute refractive index
 Ratio of speed of light in air or vacuum to the
speed of light in that medium
 μ = Speed of light in vacuum or air (c)
---------------------------
Speed of light in medium (V)
Ex: μ (glass) = speed of light in air / speed of light in glass
refractive index has no units

15. Refrative index of glass is 1.5

16.  1) When the angle of incidence at the boundary of two media is zero (i = 0)
 2) When the refractive index of medium two is same as that of medium one.

17. • Speed changes
• Frequency remains same
• Wavelength changes
3 × 108ms-¹
2 × 108ms-¹

18. 1) Nature of the medium
2) Physical conditions such as
temperatures
3) The color (or) wavelength of
light

19.  Optical density is more speed of light is
less(refractive index more)
 Optical density is less speed of light is
more(refractive index less)
 Optical density ( refractive index)
is inversely proportional to speed of light

20.  Temp increases speed of light
increases (refractive index less)
 Temp decreases speed of light
decreases(refractive index more)
 Temperature is inversely proportional to
refractive index

21.  Wavelength increases speed of light
increases( refractive index decreases)
 Wavelength decreases speed of light
decreases( refractive index increases)
 Color or wavelength is inversely proportional
to refractive index

25.  1) The thickness of the glass block
 2) The angle of incidence
 3) The refractive index of glass block, and
therefore also on the wavelength of light
used.

27. p
o
The image A2 is the
brightest image
because it is due to
the light suffering a
strong first reflection
at the silvered
surface NO
100%
4%

28. THANK YOU
CATCH ME ON 8919137208
KAMALAKAR