Register to reply 
Light bent in gravitational field.. 
Share this thread: 
#1
Jun911, 06:56 AM

P: 35

i am new to GTR. Mytext book use an example to show ligt bendinf.
when a light release from the back of the rocket which goes around the earth, since the rocket is in free fall, light would not bent relative to the rocket, but bent relative to earth. my problem is, is that means the amount of bending depend on the speed of the rocket? if the rocket is very fast, than light would travel greater distance relative the earth, so there more bending? If there is no rocket, but just a light source above the earth, would it bent at all? Thank you... 


#2
Jun911, 10:02 AM

Emeritus
Sci Advisor
PF Gold
P: 5,597

It would indeed be a problem if two geodesics, initially tangent at a given point in spacetime, later diverged. But that isn't the case here. 


Register to reply 
Related Discussions  
The speed of light in a gravitational field  Special & General Relativity  92  
How does light bend under gravitational field(gravitational force), why?  Special & General Relativity  2  
Are gravitational waves bent by gravity?  Special & General Relativity  7  
Change of speed of light in a gravitational field  Special & General Relativity  9  
Interaction of light with the quantum gravitational field  Beyond the Standard Model  10 