Recent content by piglet

Homework Statement Monochromatic light of variable wavelength is incident normally on a thin sheet of plastic film in air. The reflected light is a maximum only for 482.9 and 676.0 in the visible spectrum. What is the minimum thickness of the film ? Homework Equations 2nt=m*lambda...

We were only taught about the phase shift being either pi or 0. I understand that its destructive (black light). I am not sure about your way of going about the phase shift...I don't think I've learned that yet. I do know, that the first reflected ray has a phase shift pi and the one from the...

ahh i understand..i think. So anytime no light is reflected for refraction indexes...or black for slits etc...then its destructive. And you only "swap" construct. and destructive formulas when you have an air gap aka "wedge"?

Homework Statement What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 520 ? The index of refraction of the film is 1.34, and there is air on both sides of the film. Homework Equations Im wondering do I...