Question

Velocity of light in diamond is 5/12 of that in air . Velocity of light in water is 3/4 that of air . The angle of incidence of Ray of light traveling from water to diamond (r= 30°) is ??

Answer 1

Answer:

ok fine see and do the sum with interest

Answer 2

The angle of incidence of ray of light traveling from water to diamond is$sin^-^1(1.1)$

Explanation:

Velocity of light in medium, v = V/n  

where n is the refractive index of the medium.

Given, v = (5/12) V.

So, (5/12) V = V/n

n = 12/5, ( for diamond).

Similarly for water,

refreacive index, N = 4/3.

To calculate the angle of incidence, Use Snell's law of refraction:

$N (sin i)=n(sinr)$

Here i is the angle of incidence and r is the angle of refraction.

Given r = 30 degree.

substitute the values, we get

$\frac{4}{3}sini=\frac{12}{5}sin30^0$

$sini=\frac{10}{9}$

Thus, the angle of incidence of ray of light traveling from water to diamond is$sin^-^1(1.1)$ .

#Learn More: Snell's law of refraction: