Question

1) sin" (34
2) sin" (35) 3) sin(96 4) sin
A swimmer is swimming inside a tank of water. He looks up at the sky through
surface is calm and sky is bright due to day light. He can see:
1) A small illuminated patch directly above his head whose angular size is inde
2) A small illuminated patch above his head whose angular size depends on the
3) nothing but darkness outside the tank
4) the entire top surface of the water​

Answer 1

Answer:

(4) the entire top surface of the water