Light rays fall normally on the vertical surface of a glass prism (n- 1.6) as sh
ID: 2034863 • Letter: L
Question
Light rays fall normally on the vertical surface of a glass prism (n- 1.6) as shown in Figure. 1) What is the largest value of 0 such that the ray is totally internally reflected at the slanted face? (Express your answer to three significant figures. Submit You currently have O submissions for this question. Only 10 submission are allowed. You can make 10 more submissions for this question. 2) Repeat the calculation if the prism is immersed in water with n 1.33. (Express your answer to three significant figures.) Submit You currently have O submissions for this question. Only 10 submission are allowed You can make 10 more submissions for this questionExplanation / Answer
1)
let theta_i is the minimum incident angle at the slanted face.
use Snell's law
sin(theta_i)/sin(theta_r) = n2/n1
when total internal reflection takes place, theta_r = 90 degrees
sin(theta_i)/sin(90) = 1/1.6
theta_i = sin^-1(1/1.6)
= 36.7 degrees
from figure
theta = 90 - theta_i
= 90 - 36.7
= 53.3 degrees <<<<<<<<--------------Answer
2)
use Snell's law
sin(theta_i)/sin(theta_r) = n2/n1
when total internal reflection takes place, theta_r = 90 degrees
sin(theta_i)/sin(90) = 1.3/1.6
theta_i = sin^-1(1.3/1.6)
= 54.3 degrees
from figure
theta = 90 - theta_i
= 90 - 54.3
= 35.7 degrees <<<<<<<<--------------Answer
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.