Compute all parts of given question:
Question: A beam of light in air strikes a glass slab at normal incidence. The glass slab has an index of refraction of 1.50.
Part A: Approximately what percentage of the incident light intensity is transmitted through the slab (in one side and out the other)? %
Part B: Repeat Part (a) if the glass slab is immersed in water. %
Please break down every step and do not skip over anything - I have been at this problem awhile and keep getting hung up. Thanks for the help!