What is the maximum possible arc that can be subtended by a rainbow? (Consider all possible viewing geometries).
A)90°
B)180°
C)270°
D)360°

Question

Quizplus · Accepted Answer

The maximum possible arc that can be subtended by a rainbow is 360°, which occurs when the observer is at a high vantage point, such as in an airplane, with the sun behind them. In this scenario, the rainbow can form a complete circle around the shadow of the observer.

What Is the Maximum Possible Arc That Can Be Subtended