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Commentator

Join Date: May 2007
Posts: 74

# Gravitational Lensing

05/26/2017 12:42 AM

A Black Hole bends a light ray by the order of θ = GM/c2r where M=mass of Black Hole , c is the speed of light and r is the distance of the light ray from the Black Hole. My understanding is that the Black Hole bends every part of light ray so the overall bending angle is significant. Suppose a light ray has three points A, B and C. Distance between A & B is 6400Km and distance between B & C is also 6400Km. The distance between B and the Black Hole is also 6400Km. If light ray comes from point A then the Black Hole srats bending the light ray by the order of θ = GM/c21.414r and gradually increases and becomes max at point B. The over all bending angle would be θ = GM/c2r x 12800000 (where M is the mass of black hole equal to mass of sun).

A B C

Black Hole

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Guru

Join Date: Sep 2006
Location: Auckland, New Zealand
Posts: 8448
#1

### Re: Gravitational Lensing

05/28/2017 4:10 PM

Ok, but are you sure you got the math right? Where exactly did the formula come from (do you have a link you can post)?

Also, is there a question for us or something you would like to discuss regarding communications or something? I am not sure where to go from here on this post.

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#2

### Re: Gravitational Lensing

05/29/2017 12:11 AM

https://en.wikipedia.org/wiki/Gravitational_lens

I was not sure about the Group in posting.

But I am sure electronics engineers would have interest in the astronomy.

I am M.Sc. in Organic Chemistry. I am interested in astronomy.

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Join Date: Sep 2006
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#3

### Re: Gravitational Lensing

05/29/2017 12:18 AM

Well ok then. With no explanation to what you posted and no link it was unclear what you were trying to convey.

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#4

### Re: Gravitational Lensing

05/29/2017 12:26 AM

I am researching on the possibility of solar eclipse by small black hole if it passes

by our planet- the Earth.

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#5

### Re: Gravitational Lensing

06/06/2017 8:04 AM

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#6

### Re: Gravitational Lensing

06/23/2017 1:31 PM

Gravitational Lensing would be the least of your concerns if a black hole passed through our solar system. A rogue planet passing through the solar system could cause significant danger and disruption even to the point of extinction under most conditions.

It also seems possible that your equation fits nicely with one or more observations but the concept might be entirely wrong. For instance, since gravity warps space-time, then perhaps we are actually observing a shift in space-time instead of a bend. Put that in you calculator!

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Commentator

Join Date: May 2007
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#7

### Re: Gravitational Lensing

07/06/2017 12:28 AM

The Einstein concept of space-time curvature by gravity is very difficult to understand. Usually a denture is represented graphically in space-time. We know gravity acts in all directions but the graphical presentation of gravity effect seems to be in one direction.

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#8

### Re: Gravitational Lensing

08/22/2017 10:39 AM

This is what should be shown for the effect of gravity on space time. The usual graph in 2D is just a plane on this diagram:

I suppose circular coordinates and plotting would be even better, but this view shows how gravity distortion is in all directions.

As said previously, the effect of a black hole passing through our solar system could be catastrophic if it wasn't very, very brief. It has the potential of changing orbits within our solar system. That could be bad news indeed.

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A great troubleshooting tip...."When you eliminate the impossible, whatever remains, however improbable, must be the truth." Sir Arthur Conan Doyle