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प्रश्न
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उत्तर
Factors affecting the critical angle are:
(i) The colour (or wavelength) of light.
(ii) The temperature (on changing the temperature of medium, its refractive index changes).
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संबंधित प्रश्न
What do you understand by the deviation produced by a prism? Why is it caused?
How does a ray of light bend when it travels from denser to rarer medium.
How does a ray of light bend when it travels from when it is normal to the interface of the two media.
Write down the relationship between the critical angle and the refractive index of the medium.
Complete the following diagram to show the path of the ray of a single colour in the diagram as if enters in and emerges out of the prism. Mark the angles wherever necessary. (Critical angle for glass = 42°).
A green light is incident from the water to the air-water interface at the critical angle (C). Select the correct statement.
Optical Fibres are based on the phenomenon of dispersion.
What is a mirage? How does it occur?
What is the phenomenon used in optical fiber? Explain.
- Assertion (A): Propagation of light through an optical fibre is due to total internal reflection taking place at the core-cladding interface.
- Reason (R): Refractive index of the material of the cladding of the optical fibre is greater than that of the core.
