# A beam of light passes from zircon to quartz at an incident angle of 8°. What is the angle of refraction?

##### 1 Answer

Jan 4, 2017

#### Explanation:

Refractive index of Zircon and Quartz varies as below

Zircon:

Quartz:

For this problem the refractive indices of samples are assumed as lowest.

From Snell's law we know that when a beam passes from a medium

#n_1 sin theta_1 = n_2 sin theta_2#

Inserting given values we get

#1.81 sin 8^@= 1.544 sin theta_2#

#=> sin theta_2=(1.81 sin 8^@)/1.544#

#=> theta_2=sin^-1 ((1.81 sin 8^@)/1.544)#

#=9.4^@# , rounded to one decimal place.