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Originally Posted by Michael Mozina
FYI.....
Before I even CONSIDER the math you threw at me about presumably "massless" photons being lensed to the point we can "see" it, I need someone to explain to me how presumably netrinos are immune from this behavior again.
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I don't think they are immune from being lensed, they just don't get lensed as much as you claim they would. And they are a bit harder to observe.
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How can you use a massless thing to measure the density of another body of mass?
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Well, you would expect the photons, or any other objects, to travel through a straight line in space unless any force, or say, gravity affected them. (gravity isn't seen as a real force by the relativity btw)
Now, according to relativity, objects with (huge) mass bend and curve the space around them. Now, in a curved space (say, near our sun) the straight line isn't very obvious to us. Hence it looks like the photons curved around the sun. The amount of curvature of spacetime depends on the mass of the sun alone.
So, do you disagree with relativity in this particular case OR do you agree that current calculations of sun's mass add up? You really can't do both!