I need help over these 3 questions
1. Express (3+i4) in polar coordinates, ie. find r and Ө for which (3+i4) = re^( iӨ )
2. Find the sum of the following superposition of waves using complex numbers:
3sin(kxwt+2)+2sin(kxwt1) .
3. A wave with wave vector of magnitude k are in phase at slits 1 and 2. What is the phase difference between the partial waves arriving at P from slits 1 and 2 for light from a heliumneon laser ( 入=633 nm) when r1=65mm and r2=66mm.
