Question

someone help me with question 9 and pls show the steps of the solution​

Answer 1

opposite 30 degree will be formed

Answer 2

The angle formed by Cd with the normal is 30° since the angle of incidence =angle of emergence and,

Refractive index = c/v

1.7 = 3x10 ^8 / v

Implies v= 3 x 10^8 / 1.7

=1.76 x 10^8 m/s