Recent content by revacious

thanks very much for your help. hopefully this comes up in my exam tomorrow lol.

Ok so N=0 churns out a negative wavelength which is clearly wrong N=1 churns out 1702 nm N=2 churns out 567nm (the answer is 570 so this is right!) N=3 churns out 340nm which is apparently in the ultraviolet region ... I will choose the one which is in the visible spectrum, but will there...

just realized that edited posts are not bumped. Sorry for this double post!

thanks for clearing those things up! i will try to understand again tomorrow morning; I am falling asleep at the books here! hopefully it will come to me in a dream. But it probably won't and you will probably find me posting again in a few hours. brb! thanks for clearing those things up! i...

Well, I got the answer by formula monkeying it and subbing m=1 into the destructive interference equation. But the real problem is I have no idea what I'm doing even though I can get the answer. My interpretation of the question: When white light (mixture of wavelengths) strikes the air film...

A planoconvex lens is shaped like a capital D. One side has 0 power, and the other side has a power (because it has a curvature). Assume the lens has a thickness of d and a refractive index of n. The BVP is given by (F1+F2-(d/n)F1F2)(1-(d/n)F1) The FVP is given by (F1+F2-(d/n)F1F2)(1-(d/n)F2)...

Assuming I've read your diagram correctly... this is 2 thin lenses of power F1 and F2 separated by a distance d. Let the back vertex power be denoted by Fv'. Fv' = (F1 + F2 - dF1F2)/(1-dF1) by definition. Then the back vertex length fv' is given by 1/Fv' So tan(theta) = h1/fv' = h1Fv' Now...

Interference with thin film :( Homework Statement A soap film in air is 320nm. thick. If it is illuminated with white light at normal incidence, what colour will it appear to be in reflected light (assume that the index of the soap film is 1.33). Homework Equations The condition for...

okay, thanks for the input, i think i get this concept better now :)

Ok i figured half of it out, it was meant to be a v with a bar instead of v^-2 for the second equation. gah, i feel stupid now. And with the rms equation, is the constant always 8.314? Would we ever need to use the other versions of the gas constant?

Homework Statement Ok, firstly, I apologise for posting something which is probably trivial to any physics student, but my understanding of physics is pretty poor, so baby steps would be appreciated! Homework Equations PV=nRT E = 1/2 mv2 The Attempt at a Solution My understanding of it so...