Recent content by Radiohannah

Sorry, I'm finding it difficult to grasp some of the basics From a Schwarzschild metric You can get the proper and coordinate times, and the time measured by an observer at some distance from the source. I was wondering if you could similarly get a 'distance' from the metric, measured by a...

HOWEVER, may I ask I don't see how you could then interpret distances from this metric? ie from a Schwarzschild metric? I know that for a stationary observer, the radial and the angular parts would equate to 0. And I know that in general the distance between 2 points separated by dr would NOT...

Brilliant thank you :-)! woops

Hello! May I ask a few questions, I am trying to understand how the metric tensors work in general relativity. In particular, why you would want to make either the radial or transverse part look Euclidean? In what situations is that useful? I am happy that in a very general form, the...

Solved it! It must be a sum, was mistaking my logs for lns :-(

Hello! I'm getting a bit confused with how to deal with sound waves that are within one critical bandwidth of each other. I do not fully understand how you are meant to combine the intensities of sound waves when they lie within one critical bandwidth?! I would really appreciate some...

Hello! Cheers! I think I see what you mean. Do the metrics take into account the shape of the Universe? Or only the curvature of space-time by mass (since the shape "has no measurable effect on things like orbits")? I think I am confused because in the metrics I have seen, there is a term for...

Hello! I'm trying to get my head around general relativity at the moment...(!), and there's one aspect of it that's really causing me a lot of kerfuffle. I understand that in an appropriately sized local inertial frame, the laws of special relativity occur. On those scales the curvature...

:-D Cheers! I think we figured it out, we think it just means something really far away...

Hello! I have a few questions about how the Affine connection works. I know the geodesic equation; \Gamma^{\lambda}_{\mu \nu} = \frac{\partial x^{\lambda}}{\partial \xi^{\alpha}} \frac{\partial^{2} \xi^{\alpha}}{\partial x^{\nu} \partial x^{\mu}} So, for example, if I had the...

Great thank you!

Hello! I'm getting muddled with the notation in my notes, in which I have \overline{(E-\overline{E})(P-\overline{P})} From which you can get \overline{EP} - \overline{E} \ \overline{P}I can see where these come from, but not where the \overline{E \overline{P}} - \overline{\overline{E} P}...

The "Wave Zone" Definition Hello! We are trying to figure out exactly what the "Wave Zone" is when considering potentials. We know that a moving charge will generate a "disturbance" in the surrounding fields, which propagates outwards at light speed. This means that for great distances...

Mute! I see! Woops! Thank you that makes sense :-)

*OH* ok I think I get it, so for my term \frac{\partial}{\partial p_{j}} ln p_{i} all of the terms would be zero apart from the once instance in which the j = i in the summation? And that justifies getting rid of the summation sign? Is that right? Thanks! Hannah