Select the correct answer and solve the given problem:
 
Light rays travel from vacuum into a glass whose refractive index is \(1.5\). If the angle of incidence is \(30°\), calculate the angle of refraction inside the glass.
 
The angle of refraction is found by using the Snell's law,
 
 
By applying the known values in the formula, we get,
 
\(r\) \(=\) \(°\)