Question
Question: A fish is a little away below the surface of a lake. If the critical angle is 49<sup>0</sup>, then t...
A fish is a little away below the surface of a lake. If the critical angle is 490, then the fish could see things above the water surface within an angular range of qŗ where –
A
q = 490
B
q = 900
C
q = 980
D
q = 24
Answer
q = 980
Explanation
Solution
q = 2C = 2 × 49 = 980