Question

Perspex is a form of transparent plastic. It has a refractive index n = 1.50. A ray of light strikes the flat surface of a Perspex block with an angle of incidence of 40". What will be the angle of refraction?​

Answer 1

Answer:

the refractive index = 0.428

Explanation:

n=1.5

i =40°

r = ?

n = sini/sinr => 1.5= sin40/ sinr =>sin r= sin40°/1.5

=0.643/1.5=0.428

Answer 2

Answer:

25.40 degrees

Explanation:

Sin I/n

Sin40/1.5

=0.643/1.5

0.429

Sin-¹0.429

=25.40