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प्रश्न
Express the refractive index μ of a medium in terms of the angle of incidence i in air and the angle of refraction r in a denser medium.
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उत्तर
If light travels from air into another denser medium, the refractive index ‘μ’ of the medium.
`μ="Sine of the angle of incidence in air"/"Sine of the angle of refraction in the denser medium"`
`μ=sin i/sin r`
संबंधित प्रश्न
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Choose the correct option.
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Solve Numerical example.
A monochromatic ray of light is incident at 37° on an equilateral prism of refractive index 3/2. Determine angle of emergence and angle of deviation. If angle of prism is adjustable, what should its value be for emergent rays to be just possible for the same angle of incidence?
Solve Numerical example.
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A rectangular block of glass ABCD has a refractive index 1.6. A pin is placed midway on the face AB (Figure). When observed from the face AD, the pin shall ______.

- appear to be near A.
- appear to be near D.
- appear to be at the centre of AD.
- not be seen at all.
A jar of height h is filled with a transparent liquid of refractive index µ (Figure). At the centre of the jar on the bottom surface is a dot. Find the minimum diameter of a disc, such that when placed on the top surface symmetrically about the centre, the dot is invisible.

