Determine the maximum angle of refraction when a light ray is...

According to Snell's law:

$\mu_1 \sin i = \mu_2 \sin r$

For light traveling from glass ($\mu_1 = 1.50$) to air ($\mu_2 = 1$), we have:

$1.50 \sin i = 1 \sin r$

The maximum possible value for $\sin r$ during refraction is $1$, which occurs when the incident angle is equal to the critical angle.

When $\sin r = 1$, the angle of refraction is r = 90^{}^{{}^{\circ}}.

Therefore, the maximum angle of refraction is 90^{}^{{}^{\circ}}.