Recent content by Robin

If it's predetermined then no need for spooky action at a distance. So why the spooky action at a distance issue in Physics ?

How do we know for sure that the photon's orientation isn't determined until we we measure it ?

It seems to me people confuse two words A] Deterministic B] Prediction Quantum mechanics does not prove the universe is indeterministic. It simply proves there are certain things we are unable to predict

My understanding is that quasars are galaxies that are billions of light years away. Thus we see them as they were billions of years ago when they were much younger than our own galaxy & other galaxies nearby to us. The immense energy they emit is generated by matter falling into the central...

Energy has mass & therefore gravity. Yet dark energy is repulsive !? Energy has mass & therefore curves space resulting in gravity. Yet dark energy is repulsive ! Anyone have the answer to this contradiction? Thanks

The assumption that the action of gravity is scale dependant seems to be a fudge. But then one could argue dark matter is a fudge. I can't help thinking if the action of gravity is scale dependant then the incredibly accurate measurements made by astronomers would reveal this when comparing for...

The filament was my main area curiosity. Whe you speak of contration alonmg the filament, do you mean the DM in the filament falling to the clumps at each end or in towards the axis of the filament ? My guess is that as the diameter of the filament contracts then the attraction towards the axis...

Creation implies that at sometime it did not exist. It implies it had to have a beginning. What if there is a source of energy outside space & time & thus eternal. Except since it's outside space & time it's beyond the eternal. Because eternal implies travel through time for ever. But as I...

Your question contains the phrase 'coming into existence' which involves time. Time didn't start until the big bang occurred.

Why is dark matter distributed in a web rather than falling into clumps ? Under the action of gravity normal matter falls into galaxies, stars, planets etc. How is it that DM doesn't do the same but instead is in web form ?

That's a fascinating phenomenon. Rather like evaporation. I'll Google "smoot TED". DM is fascinating as it's so different to normal matter. Makes one realize how much a part EM forces play in the way ordinary matter behaves in space. Thanks for your reply. One other question. Why doesn't DM...

Some of the spiralling in due to gen relativity effects I believe. I guess dark matter will be subject to this effect. Still it's interesting that when people talk of a black hole being 4 million solar masses, or however much, as calculated by observing the movement of stars at the centre of...

Why doesn't dark matter fall into black holes ? Assuming it doesn't of course. If it did then surely huge amounts would have fallen into black holes. By now they'd be full of the stuff & more massive than they are. So I'm assuming for some reason dark matter doesn't fall into black holes. In...

It seems to me Afshars experiment demonstrates no more than does Youngs slit experiment. That is to say there is an interference pattern with both slits open & no interference pattern when one slit, or pinhole in Afshar's case, is covered. The light scattering off the wires in Afshar's...

Why do you think mirrors should make the room lighter ? They don't scatter the light, including not scattering it in the direction of your eyes. Just like the sky on the moon is all but black, becuase there is no atmoshere to scatter the sunlight. The light bounces back & forth between the...