Question

Problem regarding light rays and phases

Answer 1

path differnce = d sin(Theta)= Slit separation x sine of the angle

Answer 2

Then phase difference = (2pi/wavelength) * path difference

Answer 3

These are my solutions, would anyone be able to check?
\[\text{a).}~~~314.82^{\text{o}}\]\[\text{b).}~~~419.05^{\text{o}}~~\longrightarrow~~~59.05^{\text{o}}\]@IrishBoy123 @Astrophysics

Answer 4

Don't know why it didn't tag! but @IrishBoy123