Recent content by pakontam

any microscopic answer?

take it as em waves. if the path difference is nlambda, where n is an integer, the interference will be a constructive one. if the difference is (n+1/2)lambda, it'll be distructive. what's it if the difference is neither nlambda nor (n+1/2)lambda? thanks.

if you mean snooker, yes, it's possible to predict, based on the assumption that no energy is lost and the balls are of the same mass. (assume correct, is it?) but u don't know the energy 'status' of the system after the collision, how do u predict?

it is possible to predict the subsequence motion of two point mass after a linear collision, given ONLY their mass and velocity before the collision? thanks.

hobnob: that's simple, though never thought of it. obviously that's highly inaccurate, or is it? any famous experiment using this method? sourabh: seems that I've heard of that. but, doesn't the laser have to be a high power one?

hey, how to find the distance of two planets, say, Earth and moon? i know it can done by apply equations of circular motion and gravitation, but it seems to me that there's always a piece of information missing. like, mass of Earth M : mg = GMm/r^2 M = gr^2/G u still need r to find M...