Gravitational lensing angle equation

AI Thread Summary
The discussion revolves around finding an equation for the angle of light deflection due to gravitational lensing, illustrated in a diagram featuring two stars and the Sun. A user requests assistance in determining this angle, specifically referencing the apparent and true positions of the stars. Another participant suggests consulting the Wikipedia article on gravitational lensing, noting that the relevant formula is located in the section discussing space-time curvature. The exchange highlights the importance of accessible resources for understanding complex astrophysical concepts. The conversation concludes with appreciation for the helpful direction provided.
scupydog
Messages
101
Reaction score
0
Hello.

In the attached a diagram there are 2 stars on the left, the upper star is the apparent position as veiwed from Earth and the lower star the true position. The central star is the Sun

Could anyone give or direct me to an equation for the angle by which the light is deflected aº in the attached diagram.
 

Attachments

Astronomy news on Phys.org
scupydog said:
Hello.

In the attached a diagram there are 2 stars on the left, the upper star is the apparent position as veiwed from Earth and the lower star the true position. The central star is the Sun

Could anyone give or direct me to an equation for the angle by which the light is deflected aº in the attached diagram.

See the Wikipedia article on "http://en.wikipedia.org/wiki/Gravitational_lensing" ". The relevant formula appears in the section "Explanation in terms of space-time curvature".
 
Last edited by a moderator:
Thx for your reply Johnathan, i never thought to look on there. lots of interesting stuff.
 

Thread 'How feasible is home radio astronomy?'

Is a homemade radio telescope realistic? There seems to be a confluence of multiple technologies that makes the situation better than when I was a wee lad: software-defined radio (SDR), the easy availability of satellite dishes, surveillance drives, and fast CPUs. Let's take a step back - it is trivial to see the sun in radio. An old analog TV, a set of "rabbit ears" antenna, and you're good to go. Point the antenna at the sun (i.e. the ears are perpendicular to it) and there is...
View full post »

Thread 'Our Beautiful Universe - Photos and Videos'

This thread is dedicated to the beauty and awesomeness of our Universe. If you feel like it, please share video clips and photos (or nice animations) of space and objects in space in this thread. Your posts, clips and photos may by all means include scientific information; that does not make it less beautiful to me (n.b. the posts must of course comply with the PF guidelines, i.e. regarding science, only mainstream science is allowed, fringe/pseudoscience is not allowed). n.b. I start this...
View full post »

Similar threads

B Are some objects in the night sky just older images of other objects?
Replies
12
Views
2K
I Gravitational lensing: deriving magnification of lensed image
Replies
2
Views
2K
B Beware of "truthiness" in astronomy in seemingly reliable websites
Replies
21
Views
2K
I Nuclear reactions in the Sun and other topics on stars
Replies
49
Views
5K
I Star Gravitational Binding Energy Questions
Replies
8
Views
7K
I Two recent tests of loop quantum gravity theory
Replies
15
Views
5K
B Gravitatonal field force arrow diagram for Sun and Earth
Replies
2
Views
1K
I New Hubble Paper On Lensing In Galactic Clusters
Replies
2
Views
2K
A Could gamma-ray bursts have an intragalactic origin?
Replies
29
Views
354
Gravitational Lensing Q: Angle Deflection Sun/Earth?
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top