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by Quirkie on March 27th, 2008
by Anonymous on November 29th, 2008
by jehan60188 on March 27th, 2008
Do you support nuclear energy ?
by Hüseyin_Y on April 18th, 2012
| 1 person likes this
Doesn't Albert Einstein look like someone glued a mustache on a troll doll?
by L'Amber-DonOfTheChainsawMafia on December 16th, 2012
| 2 people like this
A maths problem.
This is not a home work, but a challenge for some Abers, I know like them.
See description.
by Crowsnest on November 6th, 2012
| 3 people like this
Out of three types of radiations(alpha, beta, gamma), which has the maximum ionizing power and why?
by SuprabhatDas on July 22nd, 2012
| 1 person likes this
Inside the nucleus, there is no electron but during radioactive decay, electrons are emitted from the nucleus. How?
by SuprabhatDas on July 22nd, 2012
| 1 person likes this
You're reading Why does a photon, a massless particle, impart a motive force on matter? When it does, what happens to the photon?
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Comments
WoW, you have answered this completely, wish that I could rate your answer higher. Thanks much
by LEFTANGLE on March 27th, 2008
Excellent ansswer -- +6 from me. Wish I could rate it higher, too!
by xprofessor on November 29th, 2008
last part, i'd rephrase as "Photons are not conserved, the way electrons, protons and some other particles are, so they can appear and vanish without any antiparticles"
by purplecows on April 24th, 2009
i wonder if a neutrino's rest-mass (if it has any) is due to its spin (it's hardly got anything else)
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Where are you getting this: "Most, if not all, of a proton's mass is due to internal motion." ???
by purplecows on June 9th, 2009
"But what is "rest mass"? - it is the mass that something would have it it were stationary - and photons are never stationary."
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And if you try to make the photon stationary (i.e. make yourself stationary, relative to the photon), by traveling faster and faster -- from your point of view, the photon has less and less mass!
by purplecows on June 9th, 2009
More on proton: http://www.symmetrymagazine.org/breaking/2009/05/02/making-3d-images-of-the-proton/
Spin is angular momentum rather than mass or energy and even if it did account for some energy in some way the spins of the neutrinos are all exactly the same, while the masses are known to be different.
by Quirkie on June 9th, 2009
oh, and, the ability to transfer momentum implies mass
by purplecows on June 9th, 2009
The photons aren't necessarily gone after an "impact". If the surface is reflective, the photon can bounce off, imparting some of its momentum/energy to the object.
by deleted2013 on December 19th, 2009