Hello. I need some sort of explanation. I was unsuccessfully trying to find information on the web and derivation by hand seems rather complicated for me. So I have a such set-up:
HeNe laser ->> plano-concave lense )], light is incident by some angle (NON 0°). then looking to reflection...
I asked the question what should I say to children, F=ma or a=F/m, but almost all replies were that I should adopt different notion of mass and go to the relativistic quantum. I definitely recognize the applicability of theories, it was irony which was hardly noticed. Classical physics is mostly...
That's hardcore... I presume then, that non-relativistic quantum mechanics which I am taught now is rubbish? However it is off-topic. So what about topic? Why does all textbooks and Wikipedia and other sources write rubbish?
How can you describe particle with no mass in theory of relativity or quantum??
I recognize that photon has no rest mass, but It is nonsense, because it does not exists at rest. And then it moves, it have mass from E=mcc...
What does it mean to have no mass? What it does not exist?
Which formulation of Newton's second law is more fundamental??
Hi there!
I was Googling for interesting demonstrations in Physics, and I was lucky enough to find very interesting blog. Although it is completely new- the guy is writing it only for two weeks, but it already has a lot of nice...
Hello!
I am currently a second year student at Scotland (by I am not from UK, I am from smaller country in EU), and I am successfully studying Physics and Maths after successful direct entry to second year. Unfortunately I currently see a big dilemma waiting for me.
At first main, general...
Yes R is a constant.
Okay I guess I understood a bit:
x(t) = c_{1}e^{\frac{18(\sqrt{\frac{27}{R^{2}}+\frac{50\sqrt{3}}{9}}-\frac{3\sqrt{3}}{R})}{5\sqrt{3}}t}+c_{2}e^{-\frac{18(\sqrt{\frac{27}{R^{2}}+\frac{50\sqrt{3}}{9}}+\frac{3\sqrt{3}}{R})}{5\sqrt{3}}t}
anyway to me it gets too crazy...
Hello, I hope I am writing to right part of a forum...
I made a differential equation when I was solving my problem, but unfortunately I am not capable of solving such equation since I am only 12th grader.
Or maybe it is not possible to solve it at all...
Hey I have several questions about waves and particles.. I believe I mixing it...
Okay firstly we have two stones, One big and one small. First i drop to water one and measure amplitude, freaquency, velocity and energy of a wave. And then another one..
What results I would get, will...
How physics works when falling ELASTIC ball hits 45 degree slope?
At point of colision what forces are working? As do I believe- in time delta t- one force as moment was straght with y axis(prependicular to ground) and Normal force( or how do u call it) witch is prependicular to 45 degree...
I would use calculus if i know how to use it, in school i do not have lessons with it, unfortunately, since I am 11grader. But infact i know quite a lot about it. But still I don't know how to found derirative of the bottom. f(\alpha)=\mu sin(\alpha)+cos(\alpha) f'(\alpha)=\mu...