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The Cauchy's formula is...

The Cauchy's formula is

A

`n=A+ B lambda^(-2) + C lambda^(-4)`

B

`n=A+ B lambda^(-2)+C lambda^(4)`

C

`n=A+ B lambda^(2)+C lambda^(-4)`

D

`n=A+ B lambda^(2)+C lambda^(4)`

Text Solution

Verified by Experts

The correct Answer is:
A
The Cauchy's dispersion formula represents the dispersion of most of the substances with considerable accuracy . Alos from the Cauchy's dispersion formula if n is refractive index and A , Band C are constant , then `n=A + B lambda^(-2)+ C lambda^(-4)` .
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