|
It is a surface phenomenon in which there is a change in the direction of path of light when it passes from one media to another
|
|
When a ray of light passes from one media to another it deviates because of the change in the speed of the light.
|
|
1) The incident ray, refracted ray and the normal, all lie in the same plane.
|
|
2) The ratio of sine of the angle of incidence to the sine of angle of refraction is constant.
|
|
The refractive index of a medium refers to the ratio of the sine of the angle of incidence to the sine of angle of refraction. It can also be defined as the ratio of speed of light in vacuum/a medium to the speed of light in another medium.
|
|
μ = speed of light in vacuum / speed of light in a medium
|
|
medium 1μmedium 2 = speed in medium 1 / speed in medium 2
|
|
med 1μmed 2 = V1 / V2 = μmed 2 / μmed 1
|
|
1) Density of the medium
|
μ∝Density
|
|
2) Temperature
|
μ∝1/Temp.
|
|
3) Wavelength
|
μ∝1/λ
|
|
1) Thickness of medium
|
LD∝Thickness
|
|
2) Angle of incidence
|
LD∝Angle i
|
|
3) Refractive Index
|
LD∝μ
|
|
4) Wavelength
|
LD∝1/λ
|
|
1) Angle of incidence
|
Varies
|
|
2) Refractive Index
|
δ∝μ
|
|
3) Angle of Prism
|
δ∝A
|
|
4) Wavelength
|
δ∝1/λ
|
|
1) Refractive Index
|
S∝μ
|
|
2) Thickness
|
S∝T
|
|
3) Wavelength
|
S∝1/λ
|
|
A star appears as if it is twinkling- this is because of change in refractive index due to the change in temp. or density.
|
|
Bending of a pencil half underwater- this is due to the refraction of light that the pencil appears to bend towards the surface of the water.
|
|
A coin kept in a vessel is not visible when seen from just below the edge of the vessel but can be viewed from the same position if water is added.
|
|
A Pond appears shallower than its actual depth.
|
No comments yet.
Cheatography n. The art of mapping complex subjects into clear, instantly navigable reference guides.
