Which colour of light has a higher critical angle? Red light or Green light.

Explanation

To determine which color of light has a higher critical angle between red light and green light, we can follow these steps:

### Step 1: Understand the concept of critical angle
The critical angle is defined as the angle of incidence above which total internal reflection occurs when light travels from a denser medium to a rarer medium.

### Step 2: Recall the formula for critical angle
The critical angle (θc) can be calculated using the formula:
\[ \sin(\theta_c) = \frac{1}{n} \]
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