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Huygens' Principle

Light of wave...

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Light of wavelength lamda enters a medium with refractive index n2 from a medium with refractive index n1.What is the wave lenght in second medium?

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Q. Light of wavelength

λ_{1}

enters a medium with refractive index

n_{2}

from a medium with refractive index

n_{1}

. What is the wavelength of light in second medium?

Q. When a light rays enters a medium with refractive index

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from a medium with refractive index

n_{1}

at curved interface with radius of curvature

R

\frac{n_{2}}{V} - \frac{n_{1}}{U} = \frac{n_{2} - n_{1}}{R}

Now assume that the surface is plane and rewrite the formula with suitable changes.

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λ_{1}

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B

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y

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with respect to medium

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Q. A light wave enters from air into a medium of refractive index

\frac{4}{3}

. If wavelength of light in air is

6000 ˚ A

, then the wave number of light in the medium is:

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