Question

The absolute refractive index of Ruby is 1.7.
Find the speed of light in Ruby. The speed
of light in vacuum is 3 x 108 m/s.​

Answer 1

Answer:

The speed of light in ruby is 1.7647058823529 ×10⁸ m/s

Explanation:

u¹=1.7

u² =1

c= 3×10⁸ m/s

v=?

Now,

u² /u¹ = c /v

1.7 /1 = 3×10⁸/v

v= 3×10⁸ /1.7

v=1.7647058823529 ×10⁸ m/s