Question

The speed of light in vacuum and in two different glasses is given in the table
below
Medium-Speed of light Vacuum-3.00 x 10 m/s
Flint glass-1.86 x 10 m/s
Crown glass-1.97 × 10 m/s
a) Calculate the absolute refractive indexes of flint glass and crown glass.
b) Calculate the relative refractive index for light going from crown glass to flint
glass​

Answer 1

Answer:

(a) nflint = Speed of light in vacuum/speed of light in flint glass = 3 × 108/1.86 × 108 = 1.61

ncrown = speed of light in vacuum/speed of light in crown glass = 3 × 108/1.97 × 108 = 1.52

(b) crownnflint = speed of light in crown glass/speed of light in flint glass = (1.97 × 108)/(1.86 × 108) = 1.059