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Natural Science Forum / Physics / General Physics / March 2008Light falling under gravity
Gravity is ubiquitous which means that light is always falling. Under gravity it can follow curvature toward or away a massive object. Also light is effected by the slowdown of time. Shapiro gives an example of the slight wait for light passing through a slower gravitational time and loger path. Mitch Raemsch Twice Nobel Laureate 2008 > Gravity is ubiquitous which means that light is always falling. Under > gravity it can follow curvature toward or away a massive object. Also [quoted text clipped - 3 lines] > > Mitch Raemsch Twice Nobel Laureate 2008 Wrong. I have a flashlight and point it straight up. Does the light go out ? Yes. >> Gravity is ubiquitous which means that light is always falling. Under >> gravity it can follow curvature toward or away a massive object. Also [quoted text clipped - 8 lines] > I have a flashlight and point it straight up. > Does the light go out ? If you';re in a gravitational field then the light will not go out. However it's velocity will change as it passes through a gravitational potential. The same thing happens when you throw a body away from the Earth with a velocity greater than the escape velocity. If you're inside the horizon of a black hole then you must be in free-fall and you can rest assured that the beam of light will not escape the event horizon ... neither will you though ... therefore, don't try this at home or without parental supervision! lol!! Pete > <mitchg...@hotmail.com> wrote in message > [quoted text clipped - 13 lines] > Does the light go out ? > Yes. It does not have to follow a curve but gravitational time slowdown will effect its metric. It speeds up on the way out! Mitch Raemsch Twice Nobel Laureate 2008 |
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