Recent content by hog

Start from here and divide the universe into spherical shells of many light years thickness. The mass in each shell increases by R^3. It doesn't take very many shells to have the last one contain nearly infinite mass. And if the universe is infinite ... the mass is infinite in every direction. I...

Yep. You guessed it. But if the universe is infinite, then the doppler shift is being caused by the gravitational lensing of the stars the photon passes on its way in .. and that would be a lot of stars. So the stars in front have no effect .. until the photon gets there. I realize that...

... In other words a photon is energy-mass equivalent so it is effected by gravity. If the photon comes from a place of very high gravity, and we see it shifted, does the emitter have to be moving? ( this is a trick question. I'm heading to Mach's Principle :-) If high gravity can dopple...

New here :-) a mirror reflects light. It does not reflect psychology .. up, down, right, left has no definition outside of human behavior. I see that as the biggest problem in physics. Go find the right side of the Earth .. the bottom of a star. Maybe the question is, "where does human...

I have a similar problem .. the right Physics textbook. I'm retired from my university as a Mechanical engineer, and I would like to review and continue my education in Physics. Right now I'm reading and working in the Ohanian books, but I find the first one to be less than ideal. There are more...