If the critical angle is `48^(@)42'` when the media concerned are air and water and `36^(@)47'` when they are air and glass, what is the critical angle when the media are water and glass.

Explanation

To solve the problem step by step, we will use the relationship between the critical angle and the refractive indices of the media involved.

### Step 1: Understand the relationship for critical angle
The critical angle \( C \) is defined by the formula:
\[ \sin C = \frac{\mu_1}{\mu_2} \]
where \( \mu_1 \) is the refractive index of the rarer medium and \( \mu_2 \) is the refractive index of the denser medium.
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