151 reputation
3
bio website trending.us
location
age
visits member for 3 years, 1 month
seen Dec 7 '13 at 22:12

Jul
8
awarded  Teacher
Nov
17
comment Does gravitational differences affect the distance light travels? (a thought experiment)
Ahh, thanks Ron. I think I understand. A light source generates photons which travel as waves and move along all possible paths. The light source is point A. I am at point B. There is a high-gravity region exactly centered between us. Light traveling close to the star is bent towards it before reaching me. If I measure both the focused and unfocused light when it reaches me, the unfocused light will reach me slightly before the light that was influenced by the star. Is that more or less right?
Nov
17
comment Does gravitational differences affect the distance light travels? (a thought experiment)
Thats very interesting. In my scenario I intended the use of a laser to only test a single beam of light to avoid complicating the idea with parallel paths. Would it be measurable, then, that in the high-gravity region that the laser passing through the star would take 1.00001 seconds (or whatever fractional amount of time longer) to arrive at B than in the low-gravity region?
Nov
17
comment Does gravitational differences affect the distance light travels? (a thought experiment)
Thanks David for noticing that. I corrected the typo. It might have been lost in the length of the text, but I was careful to define the use of a laser versus a general light source. My understanding may be off, but I intended to present a scenario where a single point of light traveling in a confined direction would be used to avoid problems of gravitational lensing, etc. The basic answer to how you would measure the distance would be to set up points A and B at exactly one light-seconds distance from each other. In the low-grav region, A, B, and center are not influenced by external gravity.
Nov
17
awarded  Supporter
Nov
17
awarded  Editor
Nov
17
revised Does gravitational differences affect the distance light travels? (a thought experiment)
deleted 4 characters in body
Nov
17
answered Time, what is it?
Nov
17
asked Does gravitational differences affect the distance light travels? (a thought experiment)