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प्रश्न
Name any two phenomena which take place in the formation of a rainbow.
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उत्तर
The formation of a rainbow involves all three phenomena: Refraction, Dispersion and Total internal reflection.
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संबंधित प्रश्न
State the relation between the critical angle and the absolute refractive index of a medium.
Which colour of light has a higher critical angle? Red light or green light.
(i) Define critical angle.
(ii) State one important factor which affects the critical angle of a given medium.
Make the correct choices for each of the following :
Total Internal reflection takes place when
(where ∠i = angle of incidence, ∠r = angle of refraction, ∠C = critical angle)
How does a ray of light bend when it travels from rarer to denser medium
A ray of light is incident on a glass surface at an angle of 50° with the corresponding angle of refraction 30°. Find the value of the R.I. of glass.
A particle is projected such that the horizontal range and vertical height are equal. Then the angle of projection is :
A green light is incident from the water to the air-water interface at the critical angle (θ). Select the correct statement.
- Assertion (A): Propagation of light through an optical fibre is due to total internal reflection taking place at the core-cladding interface.
- Reason (R): Refractive index of the material of the cladding of the optical fibre is greater than that of the core.
The critical angle is the angle of incidence in the denser medium for which the angle of refraction in the rarer medium is:
