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प्रश्न
Define critical angle for a given medium.
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उत्तर
When a ray of light propagates from a denser medium to a rarer medium, the angle of incidence for which the angle of refraction is 90° is called the critical angle.
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संबंधित प्रश्न
State the conditions required for total internal reflection of light to take place
Name two factors which affect the critical angle for a given pair of media. State how do the factors affect it.
Total internal reflection can take place only if ______.
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?
Explain ‘mirage’ as an illustration of refraction.
Critical angle of light passing from glass to air is maximum for ____________.
Optical Fibres are based on the phenomenon of dispersion.
The phenomena involved in the reflection of radiowaves by ionosphere is similar to ______.
Which of the following is used in optical fibres?
- 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.
