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Mike, the energy of a photon doesn't have to do with it's speed. They do gain energy when falling due to gravity because they gain momentum.
The effect is real and was measured some time ago.http://prl.aps.org/abstract/PRL/v4/i4/p163_1A blue shifted photon really does have more energy. I can in principle extract that energy (for example I could have it warm up some water)and I get more energy from the bluer photon than the redder one."If it can't accelerate or de-accelerate then it can not gain or loose energy."Not true, the weights in my grandfather clock move slowly downwards to drive the clock, but they don't accelerate or decelerate.The pasta I had for lunch will provide me with energy without changing its velocity.You can't apply classical physics to relativistic problems.
Quote from: JP on 16/07/2011 23:33:42Mike, the energy of a photon doesn't have to do with it's speed. They do gain energy when falling due to gravity because they gain momentum.Momentum in classical mechanics is the product of mass and velocity.zero x velocity = zero. No gain of momentum
This is a coincidence from a another thread but I think it does answer the question.http://www.thenakedscientists.com/forum/index.php?action=post;quote=362480;topic=40248.0;num_replies=12;sesc=ea4dab58f5f23a5a4bd1176a58656db5This was posted byCPT ArkAngel17/07/2011 18:32:13 »and the links arehttp://iopscience.iop.org/1063-7869/42/10/A04http://www.itep.ru/theor/persons/lab180/okun/em_13.pdfIt would seem that photons do not gain energy when falling within a gravitational field.
Quote from: MikeS on 18/07/2011 07:33:53This is a coincidence from a another thread but I think it does answer the question.http://www.thenakedscientists.com/forum/index.php?action=post;quote=362480;topic=40248.0;num_replies=12;sesc=ea4dab58f5f23a5a4bd1176a58656db5This was posted byCPT ArkAngel17/07/2011 18:32:13 »and the links arehttp://iopscience.iop.org/1063-7869/42/10/A04http://www.itep.ru/theor/persons/lab180/okun/em_13.pdfIt would seem that photons do not gain energy when falling within a gravitational field.Maybe,but then a matter and an antimatter create less energy in gravitational field and one Joule of energy in gravitational field is less than one Joule in space without gravitational field. []
I have confused something.Your great work has confused all.We are wrong.Our eyes measure length of wave without using of time.They see contraction of length of wave in gravitational field.This is main thing,which proves increasing of energy of photon in gravitational field. Calculations with using of frequency just confirm it.Though mainstream is wrong ,proving relative time,in this case mainstream is right []
"Gravity by dilating time reduces energy" ≠ "When measuring the energy of a photon, if allowance is made to correct for time dilation/contraction, it will be seen that the energy is exactly the same." []
"An object in free-fall is in actuality inertial, but as it approaches the planetary object the time scale stretches at an accelerated rate, giving the appearance that it is accelerating towards the planetary object when, in fact, the falling body really isn't accelerating at all. This is why an accelerometer in free-fall doesn't register any acceleration; there isn't any." http://en.wikipedia.org/wiki/Equivalence_principleThis is why a photon does not gain energy 'falling'within a gravitational field. A free falling accelerator proves it.
Quote from: MikeS on 01/09/2011 07:31:40"An object in free-fall is in actuality inertial, but as it approaches the planetary object the time scale stretches at an accelerated rate, giving the appearance that it is accelerating towards the planetary object when, in fact, the falling body really isn't accelerating at all. This is why an accelerometer in free-fall doesn't register any acceleration; there isn't any." http://en.wikipedia.org/wiki/Equivalence_principleThis is why a photon does not gain energy 'falling'within a gravitational field. A free falling accelerator proves it.Electron and positron have potential energy far to mass.Then they turn into photon.The photon travels to mass.If the travel does not increase energy of the photon,then you lose this potential energy. []
Quote from: MikeS on 01/09/2011 07:31:40Electron and positron have potential energy far to mass.Then they turn into photon.The photon travels to mass.If the travel does not increase energy of the photon,then you lose this potential energy. []
The energy liberated when they annihilate exactly equals the energy of their creation and this includes the extra energy needed to create them at a higher gravitational potential.