Answer to Question #23405 in Physics for jess kinsman

Question

About how much light is reflected from a glass or water surface if the incident light is perpendicular to the surface?
Answer a. No light is reflected.
b. Less than 1%.
c. About 5%.
d. About 30%.

Answer 1

The reflection coefficient for reflection at normal incidence for glass (n=1.5) - air (n=1) interface is equal to 4% (from the Fresnel
equations).

so the answer is c - About 5%