Question

I Will Mark As Brainliest​

Answer 1

the i and r would be the same on the surface CD as the medium of change doesn't change for the light's path!

Answer 2

in the following diagram...

given: <i = 35° and <r = 15°

then ATQ,

sin i/sin r = 'sin i/'sin r

35/15 = 7/3

therefore, <'i = 7° & <'r = 3°

hope you understand...