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प्रश्न
Why do diamonds sparkle?
उत्तर
Critical angle for diamond is quite less and is only 24°. Besides these diamonds are cut very sharp, making a large number of the refracting surfaces. Hence when a ray of light enters a diamond, it suffers a series of total internal reflections on account of a very small critical angle. This makes a ray of light literally trapped within the diamond for a little time and this trapped light energy makes a diamond sparkle.
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संबंधित प्रश्न
Name two factors which affect the critical angle for a given pair of media. State how do the factors affect it.
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 denser to rarer medium.
What is meant by the term ‘critical angle’?
Answer the following question.
Under what conditions are total internal reflection possible? Explain it with a suitable example.
For total internal reflection to take place, the angle of inddence i and the refractive index µ of the medium must satisfy the inequality ____________.
Optical Fibres are based on the phenomenon of dispersion.
What is a mirage? How does it occur?
