Can Light Experience Doppler-Equivalent Slingshotting Near Massive Bodies?

[DaveC426913]

Someone asked an intriguing question:
Does light passing close to a massive body experience the Doppler-equivalent of slingshotting?
i.e. blue-shifted or red-shifted, depending on its path?
(I guess the light would be acting as the third body in a three-body system?)

 

[mfb]

Sure.

 

[berkeman]

Someone asked an intriguing question:

A friend of a friend, I suppose...?

 

[Dale]

Does light passing close to a massive body experience the Doppler-equivalent of slingshotting?

It must since the slingshotting is just an elastic collision and the interaction would have to be elastic wouldn’t it?

 

[DaveC426913]

A friend of a friend, I suppose...?

Somebody on another forum. I didn't have a good answer for him, so I came to the 'sperts.

 

[DaveC426913]

It must since the slingshotting is just an elastic collision and the interaction would have to be elastic wouldn’t it?

So, to be clear, what we're giving a thumbs-up to here is that light passing through the trailing path of a moving object, such as Jupiter or a galaxy, would appear slightly blue-shifted compared to light passing at a distance from the mass.

The light would steal a bit of momentum from the mass, slowing it down, while the light, in-turn, up-shifted.