Traveling 1 mph less then the speed of light,, and I took out a flashlight and turnerd it on pointing in front of me,, would I see the beam of light pull away from me at 1mph?
2006-07-06 09:35:08 · 12 answers · asked by jdc101073 1 in Science & Mathematics ➔ Physics
from your inertial frame the light whisks away at it's normal speed of 3*10^8 m/s. Though to a nearby stationary observer it would appear that the light beam was merely crawling away from you at a measly 1mph. This odd effect is due to time dilation.
As for anything but a light beam use this formula to find out how fast the object is moving relative to a stationary inertial frame
V=(v1+v2)/(1+(v1*v2/c2))
2006-07-12 10:48:32 · answer #1 · answered by Nick N 3 · 1⤊ 0⤋
Nope, the light from the flash light would travel at twice the speed of light minus 1mph because you are propelling it forward. Let's take a missle fired from a fighter jet for example. Let's say the the missle is capable of traveling at 1000 MPH and the jet the fire it is traveling at 500 MPH. The missle is already moving a 500 MPH so its speed would be 1500 MPH.
footnote
This is not entirely accurate do to loss of intertia and the limits of the acceleration rate of the missle, but you get the idea
2006-07-06 09:43:38 · answer #2 · answered by derajer 2 · 0⤊ 0⤋
Good question. Even at this speed you would not actually see a beam of light, it would not look any different then it does when you are moving at normal speeds. If you are talking about light from distant sources, you would however have the Doppler effect to deal with which would most likely impair your vision as you got closer and closer to the speed of light. Looking behind you as you got closer to the speed of light, the light would take a much longer time to get to you and looking forward it would get there much faster. So I guess looking behind you, it may appear as if things are slowing down or not moving, and looking forward things may appear to be going faster because you probably won't be able to process all the light that is getting to your eyes fast enough.
2006-07-06 09:47:35 · answer #3 · answered by Dexter 2 · 0⤊ 0⤋
No, according to Einstein, the general theory of relativity, as you travel faster and faster towards the speed of light time begins to slow down. Without going into huge long explanations, from your point of view the light from the flashlight would still be traveling away from you at the speed of light and not 1 mph.
2006-07-06 09:43:58 · answer #4 · answered by ziluke 2 · 0⤊ 0⤋
Joe didn't read the question. You figured it right according to the physics. The light would travel at the speed of light, one mph faster than you.
That's the "fun" part of the exercise. If you want to ponder a real deep question, considering what happens to objects as they approach the speed of light, would your eye be in any shape to observe the beam of your flashlight moving away from you?
2006-07-06 09:46:38 · answer #5 · answered by Vince M 7 · 0⤊ 0⤋
Yes, it would go 1mph faster than you - but only from an outside point of view. From your point of view, the light would go away at the speed of light.
The reason is that, in your frame of reference, dimensions in the direction of travel would shrink to a factor of 1/~1.4billion.
Relativity is just that. The speed of light is always the same in relation to a frame of reference.
2006-07-06 09:43:10 · answer #6 · answered by invert 1 · 0⤊ 0⤋
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2016-10-14 04:46:33 · answer #7 · answered by ? 4 · 0⤊ 0⤋
You wouldn't need a flashlight, travelling at that speed, you would most probably be glowing like a white hot cannonball, emitting enough light energy of your own.
2006-07-06 09:45:05 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Light speed is absolute so it does not matter the position or the speed of the observer, he will only see the Light at Light speed that is 300000km/s (I don't remember the value in mph).
2006-07-06 09:43:38 · answer #9 · answered by Anonymous · 0⤊ 0⤋
no, Light always travels at the speed of light
2006-07-06 09:41:32 · answer #10 · answered by Anonymous · 0⤊ 0⤋