Sorry i didi not express this very clearly, I'm a little unsure of the terminology.
According to my physics books A pulse of light has a phase velocity the speed of the ripples, group velocity the speed of the evelope and a front velocity the formost part of the pluse. The ripples or waves must...
Is the speed of light what they call the front velocity, the formost part of a beam of light?
If this is so the actual path of the electromagnetic wave must travel further than the distant traveled by the beam of light. So any point along the path of the wave must be traveling faster than the...
Space is not a true vacum, The solar wind is measured by its proton and electron flux, the closer you get to the suns corona the density of the protons and electrons will be much greater compared to the surounding space. I am not sure if this is dense enough to affect the passage of light.
All stars and Galaxies appear to give off the whole spectrum of electromagnetic radiation.
If one views images of the distribution of background radiation in detail it appears to be filimetary in nature. Also if one views the distribution of visible matter in the universe it also appears...
I would like to know how much light passing close to the sun will be deflected by the suns magnetic field and the increase in density of space around the suns corona.
With modern telescopes we can see magnetic fields throughout the universe, in our solar system, in and around galaxies and in interstellar space. Given that magnetic fields do not exist without moving charge i.e. a electric current.Why is it that;
a) Astrophysics only ever talk about magnetic...
If you had a lined retangular section solenoid inclined at a angle of 45 deg and you rolled a rod magnet ( just fits inside the retagular section) down it. Would the current induced in the solenoid brake or accelerate the rod magnet.