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प्रश्न
The refractive index of air with respect to glass is expressed as `""_g μ_a=sin i /sin r`.
- Write down a similar expression for aμg in terms of the angles i and r.
- If angle r = 90°, what is the corresponding angle i called?
- What is the physical significance of the angle i in part (b)?
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उत्तर
- R.I of glass w.r.t. air `= ""_aμ_g = sini/sinr`
∠r is angle of incidence in air
∠i is angle of refraction in medium - When angle r = 90°
∴ sin 90° = 1 in air
Angle i in medium is called the critical angle. - The significance of ∠i = ic = critical angle is:
The refractive index of the denser medium relative to the rarer medium can be computed using the critical angle value.
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संबंधित प्रश्न
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The refractive index of air with respect to glass is defined: as gµa = sin i/sin r
Write down a similar expression for aµg in terms of angle i and r.
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What should be the rate of the speed of light through the liquid to the speed through the glass so that there is no refraction of light at the boundaries of the glass block when the system is illuminated by the light of one colour?
