Question

the speed of light in air is 3 into 10 ^ 8 metre per second and the glass is 2 into 10 ^ 8 metre per second find the refractive index of glass

Answer 1

Answer:

R.I. = 1.5 or (3/2)

Explanation:

R.I =(Speed of light in air)/(Speed of light in medium).

R.I.=$\frac{3*10^{8} }{2*10^{8} }$

=1.5

Answer 2

Answer:

speed of light in air/speed of light in glass = refractive index

= 3*10^8 m/s / 2*10^8 m/s

= 1.50 (approx.)