Advertisements
Advertisements
प्रश्न
State the relation between the critical angle and the absolute refractive index of a medium.
Advertisements
उत्तर
`mu = 1/(sin c)` or `sin c = 1/mu`where ‘c’ is the critical angle and ‘μ’ is the absolute refractive index.
APPEARS IN
संबंधित प्रश्न
Which colour of light has a higher critical angle? Red light or green light.
The observation made by Swarali while doing the experiment is given below. Based on these write answers to the questions:
Swarali found that the light ray travelling from the denser medium to rarer medium goes away from the normal. If the angle of incidence (i) is raised by Swarali, the angle of refraction (r) went on increasing. However, after certain value of the angle of incidence the light ray is seen to return back into the denser medium.
Questions:
- What is the specific value of∠i called?
- What is the process of reflection of incident rays into denser medium called?
- Draw the diagrams of three observations made by Swarali.
Plot a graph between
Sine of angle of incidence versus sine of angle of refraction,
If a light ray does not undergo, refraction at the boundary between two media, the angle of incidence is:
How does a ray of light bend when it travels from when it is normal to the interface of the two media.
Write down the relationship between the critical angle and the refractive index of the medium.
Choose the correct option.
Angles of deviation for extreme colours are given for different prisms. Select the one having maximum dispersive power of its material.
Solve Numerical example.
From the given data set, determine angular dispersion by the prism and dispersive power of its material for extreme colours. nR = 1.62 nV = 1.66, δR = 3.1°
The angle of minimum deviation produced by a thin glass prism in air is 'δ'. If that prism is immersed in water, the angle of minimum deviation will be ______.
( aμg = refractive index of glass w.r.t, air aμw = refractive index of water w.r.t. air)
Write any two uses of total internal reflection.
