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प्रश्न
Total internal reflection occurs only when a ray of light passes from a ______ medium to a ______ medium.
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उत्तर
Total internal reflection occurs only when a ray of light passes from a denser medium to a rarer medium.
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संबंधित प्रश्न
State the conditions required for total internal reflection of light to take place
Swarali has got the following observations while doing an experiment. Answer her questions with the help of observations.
Swarali observed that the light bent away from the normal, while travelling from dense medium to rarer medium. When Swarali increased the values of angle of incidence (i), the values of angle of refraction (r) went on increasing. But at a certain angle of incidence, the light rays returned into the dense medium.
So, Swarali has some questions. Answer them –
a) Name this certain value of ‘i ’. What is the value of ‘r’ at that time ?
b) Name this process of returning of light in dense medium. Explain the process.
Express the refractive index μ of a medium in terms of the angle of incidence i in air and the angle of refraction r in a denser medium.
If a ray of light passes from medium I to medium II without any change of direction, what can be said about the refractive indices of these media (angle I is not 0)?
How are critical angles related to the refractive index of the 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.
Answer the following question.
Why is prism binoculars preferred over traditional binoculars? Describe its working in brief.
For the same angle of incidence, the angle of refraction in four media A, B, C and D are 25°, 30°, 35° and 40° respectively. The speed of light is least in medium ______.
The angle of incidence at which the angle of refraction is Q£ is called the critical angle.
Write any two uses of total internal reflection.
