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Posted: 12/29/2009 2:34:10 PM EDT
[#1]
Photons are massless, thus why they can travel at the speed of light.
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Posted: 12/29/2009 2:34:43 PM EDT
[#2]
0. Photons have no mass.z
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Posted: 12/29/2009 2:35:16 PM EDT
[#3]
Dark is Heavy though!
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Posted: 12/29/2009 2:35:27 PM EDT
[#4]
http://answers.yahoo.com/question/index?qid=20061103161156AAA6G28
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Posted: 12/29/2009 2:35:48 PM EDT
[#5]
Quoted:
Dark is Heavy though! i dunno, dark seems pretty light to me. |
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Posted: 12/29/2009 2:35:57 PM EDT
[#6]
Dude..are you smarter than a 5th grader?
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Posted: 12/29/2009 2:36:23 PM EDT
[#7]
but light can be bent by gravity.
it has to have mass if gravity can effect it, right? |
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Posted: 12/29/2009 2:37:47 PM EDT
[#8]
Photons from a Fenix TK11 have twice as much mass as natural light, and it can knock over styrofoam cups from 6 feet away.
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Posted: 12/29/2009 2:38:46 PM EDT
[#9]
Quoted:
but light can be bent by gravity. it has to have mass if gravity can effect it, right? Read the yahoo answers link that was posted earlier. It answers that exact question. |
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Posted: 12/29/2009 2:40:23 PM EDT
[#10]
Huh... funny. I always figured that the photon was the object with the least mass possible, thus its ability to obtain (and set) relativistic speeds. That our understanding of it having no mass is more a function of our inability to thus far calculate said mass, rather than it having none.
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Posted: 12/29/2009 2:42:40 PM EDT
[#11]
lite beer weighs the same as regular beer
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Posted: 12/29/2009 2:42:44 PM EDT
[#12]
The mass of a photon is relativistic. It has no mass when not moving because it is pure energy, according to Einstein's famous e=mC^2
Get a radiometer and then draw the free body diagram of the torque, noting the reflective and absorptive vanes, using conservation of momentum. |
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Posted: 12/29/2009 2:43:10 PM EDT
[#13]
Quoted: Huh... funny. I always figured that the photon was the object with the least mass possible, thus its ability to obtain (and set) relativistic speeds. That our understanding of it having no mass is more a function of our inability to thus far calculate said mass, rather than it having none. got it. thanks. |
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Posted: 12/29/2009 2:44:05 PM EDT
[#14]
Quoted:
The mass of a photon is relativistic. It has no mass when not moving because it is pure energy, according to Einstein's famous e=mC^2 Yep, photon = zero rest mass. |
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Posted: 12/29/2009 2:44:31 PM EDT
[#15]
weigh yourself. then, hold a photon and weigh yourself again. subtract
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Posted: 12/29/2009 2:46:35 PM EDT
[#16]
Quoted: 0. Photons have no rest mass.z But they do have spin and momentum. |
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Posted: 12/29/2009 2:49:14 PM EDT
[#17]
Much less than an osveriles tremen.
HH |
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Posted: 12/29/2009 2:54:42 PM EDT
[#18]
The weight of light depends on whether its a particle or a wave.
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Posted: 12/29/2009 3:19:25 PM EDT
[#19]
Quoted:
Dark is Heavy though! Thats racist! 
Photons are teh lightweight division champions! |
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Posted: 12/29/2009 3:20:54 PM EDT
[#20]
87 ounces
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Posted: 12/29/2009 3:21:17 PM EDT
[#21]
Quoted: but light can be bent by gravity. it has to have mass if gravity can effect it, right? No, gravity bends the fabric of space itself. Light merely travels through the curves gravity creates. |
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Posted: 12/29/2009 3:23:20 PM EDT
[#22]
African, or European?
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Posted: 12/29/2009 3:25:15 PM EDT
[#23]
Quoted:
African, or European? What? I don't know that! AAAAAAAAaaaaaaaaaaaaaaaahhhhhhhh!!!!!!!!!1 Stupid bridge! |
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Posted: 12/29/2009 3:53:04 PM EDT
[#24]
I shined my flashlight on my scale but the dial didn't move.
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Posted: 12/29/2009 3:56:25 PM EDT
[#25]
I always make sure I zero my scale when I turn the lights on!!
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Posted: 12/29/2009 4:03:44 PM EDT
[#26]
How do those things work, with the diamond shaped paddles, black on one side, white on the other that start spinning when you put them in sunlight?
What 'pushes' the paddles?
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Posted: 12/29/2009 4:05:13 PM EDT
[#27]
3 fig neutrons
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Posted: 12/29/2009 4:06:18 PM EDT
[#28]
good luck holding it still long enough to weigh it.
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Posted: 12/29/2009 4:10:29 PM EDT
[#29]
This is heavy.
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Posted: 12/29/2009 4:15:22 PM EDT
[#30]
Quoted:
good luck holding it still long enough to weigh it. I just mount my scales on beams of light and it moves along at the same speed as the light I'm weighing. |
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Posted: 12/29/2009 4:21:22 PM EDT
[#31]
Quoted:
Huh... funny. I always figured that the photon was the object with the least mass possible, thus its ability to obtain (and set) relativistic speeds. That our understanding of it having no mass is more a function of our inability to thus far calculate said mass, rather than it having none. "inability to thus far calculate said mass"... Yup, photons have/are energy, so they must have mass. 
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Posted: 12/29/2009 4:21:40 PM EDT
[#32]
Quoted: The weight of light depends on whether its a particle or a wave. In typical arfcom fashion, its both! |
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Posted: 12/29/2009 4:25:23 PM EDT
[#33]
Quoted:
How do those things work, with the diamond shaped paddles, black on one side, white on the other that start spinning when you put them in sunlight? What 'pushes' the paddles? It's da beamz what does it!
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Posted: 12/29/2009 4:31:39 PM EDT
[#34]
the vanes are in partial vacuume, when a gas partical touches the dark side it absorbs energy and pushes off, when it hits the shiny side it bounces without gaining energy.
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Posted: 12/29/2009 4:32:01 PM EDT
[#35]
Don't know, but I bet it's pretty light weight.
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Posted: 12/29/2009 4:32:27 PM EDT
[#36]
they run on heat not light.
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Posted: 12/29/2009 4:37:52 PM EDT
[#37]
I turn on a switch and the light goes on...
You guys over think this shit.
GM |
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Posted: 12/29/2009 4:42:07 PM EDT
[#38]
Quoted:
How do those things work, with the diamond shaped paddles, black on one side, white on the other that start spinning when you put them in sunlight? What 'pushes' the paddles? The expansion of air as it is heated by the black side (which absorbs more radiant energy). |
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Posted: 12/29/2009 4:42:35 PM EDT
[#39]
Quoted:
Dark is Heavy though! I see what you did there... |
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Posted: 12/29/2009 4:44:56 PM EDT
[#40]
Quoted:
weigh yourself. then, hold a photon and weigh yourself again. subtract 
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Posted: 12/29/2009 4:47:09 PM EDT
[#41]
Quoted:
Quoted:
How do those things work, with the diamond shaped paddles, black on one side, white on the other that start spinning when you put them in sunlight? What 'pushes' the paddles? The expansion of air as it is heated by the black side (which absorbs more radiant energy). No, light exerts pressure on an object. across a 1sq mile flat, reflective surface it exerts the same pressure as if a marble was sitting on that same surface at sea level on the Earth. Solar sails, BTW, are the reason I know this. |
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Posted: 12/29/2009 4:50:03 PM EDT
[#42]
Quoted:
Quoted:
Quoted:
How do those things work, with the diamond shaped paddles, black on one side, white on the other that start spinning when you put them in sunlight? What 'pushes' the paddles? The expansion of air as it is heated by the black side (which absorbs more radiant energy). No, light exerts pressure on an object. across a 1sq mile flat, reflective surface it exerts the same pressure as if a marble was sitting on that same surface at sea level on the Earth. Solar sails, BTW, are the reason I know this. Then why is more pressure exerted on one side of the paddle than the other? |
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Posted: 12/29/2009 4:50:31 PM EDT
[#43]
Light is light.
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Posted: 12/29/2009 4:50:53 PM EDT
[#44]
so if photons are going away from you at the speed of light, aren't you going away from the photons at the speed of light from their perspective? If so, how come I can go the speed of light and not have to use infinite energy?
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Posted: 12/29/2009 4:53:40 PM EDT
[#45]
Quoted:
Quoted:
Quoted:
Quoted:
How do those things work, with the diamond shaped paddles, black on one side, white on the other that start spinning when you put them in sunlight? What 'pushes' the paddles? The expansion of air as it is heated by the black side (which absorbs more radiant energy). No, light exerts pressure on an object. across a 1sq mile flat, reflective surface it exerts the same pressure as if a marble was sitting on that same surface at sea level on the Earth. Solar sails, BTW, are the reason I know this. Then why is more pressure exerted on one side of the paddle than the other? Because the white side of the paddle is obviously racist, duh. 
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Posted: 12/29/2009 4:55:32 PM EDT
[#46]
Quoted: I turn on a switch and the light goes on... You guys over think this shit. GM |
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Posted: 12/29/2009 4:55:55 PM EDT
[#47]
Depends on two factors:
one; What color is the light? and two; how fast is it going? |
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Posted: 12/29/2009 5:01:49 PM EDT
[#48]
Quoted: How do those things work, with the diamond shaped paddles, black on one side, white on the other that start spinning when you put them in sunlight? What 'pushes' the paddles? Called a radiometer. Relativistic momentum. |
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Posted: 12/29/2009 5:07:00 PM EDT
[#49]
Quoted:
so if photons are going away from you at the speed of light, aren't you going away from the photons at the speed of light from their perspective? If so, how come I can go the speed of light and not have to use infinite energy? If someone drives a car at 70 mph away from you, are you travelling 70 mph away from them? Or are you standing still? |
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Posted: 12/29/2009 5:09:22 PM EDT
[#50]
Whaddya mean photons got no mass???!!!!
My remote control shoots a stream of 'em out the end. When they hit the knobs on my TV, they push 'em and turn the volume up. Gotta have mass to do that!
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