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Refractive Index

Write the def...

Question

Write the definition of refractive index of a medium.

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Solution

Refractive index of a medium is defined as ratio of speed of light in vacuum to that in the medium. It is a dimensionless quantity that describes how the light travels in the medium.

$μ = \frac{c}{v}$

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Similar questions

v_{1}, v_{2}

and c represent the speed of light in medium 1, medium 2, and vacuum respectively , write the expressions for
(a) absolute refractive index of medium 1
(b) absolute refractive index of medium 2
Hence show that

_{1} n_{2} = \frac{n_{2}}{n_{1}}

Q. Define absolute refractive index of a medium and relative refractive index.

Q. Monochromatic light of wavelength

λ_{1}

travelling in a medium of refractive index

μ_{1}

enters a denser medium of refractive index

μ_{2}

. The wavelength in the second medium is:

Q. Light of wavelength

λ_{1}

enters a medium with refractive index

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from a medium with refractive index

n_{1}

. What is the wavelength of light in second medium?

Q. The refractive index of a medium with respect to vacuum is called _______ refractive index.

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