# Homework Help: At what angle of incidence is amplitude coefficient of reflection parallel to the inc

1. Feb 9, 2009

### alchemist7

At what angle of incidence is amplitude coefficient of reflection parallel to the incidence plane 0?

my solution is that by Fresnell's equation, r//=tan(i-i)/tan(i+i)=0, i=i`,i=90.so for whatever surface,angle of incidence should be 90.

is it correct? different from the answer!

2. Feb 9, 2009