Question

Refractive index of glass = $\frac{velocityoflightin..........}{velocityoflightinglass}$.

• A. Liquid
• B. Water
• C. Vacuum or air
• D. None

Answer 1

Answer: (C)

$\frac{speedoflightinvacuum}{speedoflightinglass}=\frac{f{\lambda }_{vacuum}}{{f\lambda }_{glass}}=\frac{{\lambda }_{vacuum}}{{\lambda }_{glass}}={\mu }_{glass}\left(refractiveindexofglass\right)$