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प्रश्न
Draw diagram to illustrate the total internal reflection.
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उत्तर
When the incidence angle is greater than the critical angle, i.e., in the case of total internal reflection.
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संबंधित प्रश्न
State the relation between the critical angle and the absolute refractive index of a medium.
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.
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Critical angle of light passing from glass to air is maximum for ____________.
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)
For a ray of light, the critical angle is minimum when it travels from ______.
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The twinkling effect of star light is due to ______.
