NEET2002PhysicsRay OpticsActual
The Cauchy's dispersion formula is
Options
- An=A+B ⁻²+C ⁻⁴
- Bn=A+B ⁻²+C ^4
- Cn=A+B ^2+C ⁻⁴
- Dn=A+B ^2+C ^4 .
Correct answer
A. n=A+B ⁻²+C ⁻⁴
Step-by-step solution
The Cauchy's dispersion formula represents the dispersion of most of the substances with considerable accuracy. Also from the Cauchy's dispersion formula if n is refractive index and A, B and C are constants, then n=A+B ⁻²⁺ C ⁻⁴ .