Answer:
1.66 , This value corresponds to flint glass.
Step-by-step explanation:
Refractive index is equal to velocity of the light 'c' in empty space divided by the velocity 'v' in the substance.
Or ,
n = c/v.
Also,
c = frequency × Wavelength
The formula can be written as:
n = λ / λn.
Where,
λn is the wavelength in the medium
λ is the wavelength in vaccum
Given that: λn = 0.6024 λ
So, n is:
n = λ / λn = λ / 0.6024 λ = 1.66
This value corresponds to flint glass.