Question

When light enters from air to glass the angles of incidence and refraction in air and glass are 45 and 30 degrees?

Answer 1

The question can be solved by the application of snells law , which states that

  sin i / sin r  = n  (n = refractive index)

  Given , angle of incidence , i = 45

  angle of refraction , r = 30

  so ,  n = sin i / sin r

  =  sin 45 / sin 30

  =  1.42

 

 

Answer 2

Given:

Angle of incidence, i = 45°

Angle of refraction, r = 30°

To find: refractive index of the glass

Calculation:

Refractive index, r of any medium is given as ratio of sine value of angle of incidence to the sine value of angle of refraction.

$r=\frac{sin (i)}{sin (r)}$

Here, refractive index = $\frac{sin (45)}{sin (30)} =\frac{0.707}{0.5} = 1.414$

Answer:

Refractive index of glass 1.414.

Your question is not complete. you might be referring to the complete question below:

"When light enters from air to glass the angles of incidence and refraction in air and glass are 45 and 30 degrees? What is the refractive index of the glass?"