2006-09-18 15:15:45 · 13 answers · asked by throwingshadows7 1 in Science & Mathematics ➔ Astronomy & Space
light travels at 186,000 mi/s or 296,000 km/s
2006-09-18 15:28:28 · answer #1 · answered by mcdonaldcj 6 · 0⤊ 0⤋
All forms of electromagnetic radiation, such as X-rays, gamma rays, radio waves, microwaves, and oh yeah those little light photon wave thingies too, travel at approx 300,000 km/s in a vacuum. Usually in equations, this value for the speed of light --i.e. electromagnetic radiation--is repesented by "c" as in E=mc^2.
Oh yeah, and only a massless "particle" can travel at c. Anything with mass cannot. Photons are what are referred to as quanta of light. Photons have no mass, only quanta of energy. So, yes, they are like Spock said and the song made popular: "Pure energy"
2006-09-18 23:56:38 · answer #2 · answered by quntmphys238 6 · 0⤊ 0⤋
Light and radio waves since radio waves are said to be equal the speed of light.
2006-09-18 23:31:25 · answer #3 · answered by arcturus pendragon 3 · 0⤊ 0⤋
Theoretically, anything. Any object could be accelerated to any speed in a vacuum assuming no other retarding forces exist. Right or wrong?
2006-09-18 22:17:22 · answer #4 · answered by Neil B 2 · 0⤊ 2⤋
Light. But to be exact, light travels at 186,282.397051221 miles/second or 299,792.458 kilometers/second.
2006-09-19 00:17:37 · answer #5 · answered by Eric X 5 · 0⤊ 0⤋
Nothing.
The fastest thing, light/photons/EMR, travels at 300,000 km/s ;) (a little less actually, but hey.)
2006-09-18 22:21:10 · answer #6 · answered by Anonymous · 0⤊ 1⤋
No one has ever been able to create a vacuum so, who knows?
2006-09-19 10:57:26 · answer #7 · answered by Anonymous · 0⤊ 1⤋
light
2006-09-19 04:25:46 · answer #8 · answered by vishal_willpower 2 · 0⤊ 0⤋
light
2006-09-18 22:17:53 · answer #9 · answered by Anonymous · 0⤊ 1⤋
Your question must be 300, 000 not 3,000,000 so you must be kidding, or havent thought about it.
2006-09-19 04:22:29 · answer #10 · answered by scoop405106 1 · 0⤊ 0⤋