Name two factors which affect the critical angle for a given pair of media. State how do the factors affect it.

Question

Name two factors which affect the critical angle for a given pair of media. State how do the factors affect it.

Monjur Alahi

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2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

The factors which affect the critical angle are:

(i) The colour (or wavelength) of light, and

(ii) The temperature

(i) Effect of colour of light: The critical angle for a pair of media is less for the violet light and more for the red light. Thus critical angle increases with increase in wavelength of light.

(ii) Effect of temperature: The critical angle increases with increase in temperature because on increasing the temperature of medium, its refractive index decreases.