posted by help? on .
A laser beam enters a .125 m thick glass window at an angle of 39° (from the normal). The index of refraction of the glass is 1.46. At what angle from the normal does the beam travel through the glass? that answer is 25.53 deg
the second part asks
How long does it take the beam to pass through the plate?
Sorry, you have to show some work of your own. You just seem to be dumping your homework problems here for us to solve.
If you want more help, show more effort