Question

Can anyone help solve this

Answer 1

Answer:

.

Explanation:

i. u1 sin 30⁰ = u2 sin r

3/2 x 1/2 = 4/3 x sinr

3/4 = 4/3 x sin r

sinr = 9 /16

ii. u2 sin30⁰ = u1 sin r

4/3 x 1/2 = 3/2 sinr

4/6 = 3/2 sinr

sinr =8/ 18 = 4/9