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प्रश्न
How are critical angles related to the refractive index of the medium?
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उत्तर
संबंधित प्रश्न
Name two factors which affect the critical angle for a given pair of media. State how do the factors affect it.
What is total internal reflection?
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.
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 spherical marble, of refractive index 1.5 and curvature 1.5 cm, contains a tiny air bubble at its centre. Where will it appear when seen from outside?
Choose the correct option.
Select the WRONG statement.
Explain ‘mirage’ as an illustration of refraction.
Answer the following question.
What are the advantages of optical fibre communication over electronic communication?
A bundle of glass threads, each of which is capable of transmitting messages using light waves is called ______.
The critical angle is defined as the angle of incidence at which the total internal reflection starts to occur.
