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प्रश्न
Name two factors which affect the critical angle for a given pair of media. State how do the factors affect it.
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उत्तर
The factors which affect the critical angle are:
- Wavelength (colour) of light: Since a transparent medium's refractive index increases with violet light and decreases with red light, the critical angle for a pair of media increases with red light and decreases with violet light. Thus, the critical angle rises as the light's wavelength increases.
- The temperature: The critical angle for that pair of media increases as the temperature of the medium rises because its refractive index falls. As a result, the critical angle rises as the temperature rises.
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संबंधित प्रश्न
The diagram below shows a point source P inside a water container. Four rays A, B, C, D starting from the source P are shown up to the water surface
1) Show in the diagram the path of these rays after striking the water surface.
The Critical Angle for the water-air surface is 48°.
2) Name the phenomenon which the rays B and D exhibit.
Calculate the speed of light in a medium whose critical angle is 30° ?
(i) Define critical angle.
(ii) State one important factor which affects the critical angle of a given medium.
Write down the relationship between the critical angle and the refractive index of the medium.
The diagram shows a point source P inside a water container. Three rays A, B, and C starting from P are shown up to the water surface. Show in the diagram the path of these rays after striking the water surface. The critical angle for the water-air pair is 48°.
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.
Choose the correct option.
Consider the following phenomena/ applications: P) Mirage, Q) rainbow, R) Optical fibre and S) glittering of a diamond. Total internal reflection is involved in
Which of the following is not involved in formation of a rainbow?
What are the examples of total internal reflection in nature?
