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प्रश्न
Why do diamonds sparkle?
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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
Draw diagram to illustrate the total internal reflection.
Total internal reflection can take place only if ______.
Write down the relationship between the critical angle and the refractive index of the medium.
Name the factors affecting the critical angle for the pair of media.
How is the critical angle of a material related to its refractive index?
The adjacent diagram shows two right-angled isosceles prisms A and B. Complete the diagram to show the path of rays P and Q emerging out of the prism B. What principles have you used to complete the diagram?
Choose the correct option.
Angles of deviation for extreme colours are given for different prisms. Select the one having maximum dispersive power of its material.
Answer the following question.
What are the advantages of optical fibre communication over electronic communication?
What is the phenomenon used in optical fiber? Explain.
What are the examples of total internal reflection in nature?
