Recent content by looka

Ah, too late for the party but it clicked with me like this (please someone point if it's wrong). Not only space is curved but time as well. And time does move forward. So if curved surface of Earth is space in one dimension and time in other, and we are standing still some distance away at...

About lectures, I have seen them and read books and Feynman is just about the greatest character ever. I don't understand why he of all people thought us not to ask ourselves "But how it can be like that?" but just to "Shut up and calculate". He also seems to want us to stop trying to visualize...

Thanks for quick reply. - My guesstimate was that it would show diffraction since two parts of droplet would interact with each other on way out. You mean it would not show diffraction pattern anyway? Wasn't one of the early attempts to explain diffraction a hypothesis that more than one...

Well, classical waves just being waves don't have quanta so you can't see macroscopic duality. Yes, water droplets don't just fall apart, due surface tension. But neither do electrons or photons for some reason obviously. Point is, particle doesn't really have to fall apart to go trough...

It doesn't have to be a superfluid or silicon oil. Let's suppose a water droplets are falling to a hidrophobic (wd40 sprayed LOL) surface with double slits. It seems probable to me that scenario will happen that droplet will split on surface, pass through both slits (in some random ratio) and...

I agree with notion that there should be no central, authoritative "right answer". Centralized servers are so 1990. :smile: Let's change "central server" to "peers". I find it more beautiful in design, and certainly feels more natural. Also, more secure and harder to turn off! :smile...

I'm not physicist, but a software developer. Please don’t hang up.:smile: I am building massive multiplayer online game server, and I started building it from scratch. I found that some programming issues emerged from it which had striking resemblance to quantum quirkiness, so I just wanted to...

Hmm...I'm lost...didnt get the part. And I get different numbers. On Earth for anything to fall 1mm from being still you need a hundredth of a second. 1/1000 m = 10 m/s/s * (1/100 s)2 In a hundredth of second light would go through 3 million meters, which is 300000 reflections in our...

Thanks all. So space-time here on Earth's surface is curved a lot, and things fall not due their mass but due space-time curvature (and of course their relative velocity). So it should still be possible then to trap light (for a few milliseconds at least) so it does not escape but to show some...

Thanks DrDu. So 3000km is a problem for light? I mean it would only take a millisecond, but I guess it can't really "survive" let's say 3 million reflections in mirrors 1m apart? (or 30 million for 10cm apart) without getting absorbed. But light was successfully slowed down to 10km/s, which is...

So light gets bent but it does not fall? Does it just get absorbed before? Single photon can't be trapped long enough? Thanks!

@phyzguy: well of course because it is moving at very specific constant speed and trajectory. But it would fall if we slowed it down, right? Or keep the speed, but we made it bounce back and forth between some huge walls or force it to some other traveling path e.g. arctic circle at same...

Some introductory line about me apologizing for my ignorance and inability to find answers on interwebs. :smile: If photons get affected by gravitational field (or follow the curvature of space-time created by nearby massive objects) and have in essence some non-rest mass how come they...

Thanks for the reply, It actually did enlighten me somewhat. But kind of hard to swallow. If sun does not move linearly and constantly what then? Do we receive information (instantly via gravity wave) from sun about it's whereabouts in 8 minutes? I believe that any theory can be made to work...

Wait, you are worried about effects being instantaneous after you instantaneously dropped the whole sun? I don't like logical reasoning from impossible scenarios. :) Can anyone confirm Gara, point to some references about gravity feeling instant. Do planets and galaxies spin as they should with...