I am doing a bachelor thesis on gravity soon, and considering I have not taken GR yet, I would like a quick introduction to the subject. I am specifically seeking a good video of approximately 1 hour explaining the basic/key concept. I realise that 1 hour isn't nearly enough to make me able to do any calculations and I don't expect it to - I will learn the subject properly as we move along with the project; I just want a feeling of the subject.
I've been trying to understand the basics of General Relativity. The field equations are still way beyond me, but I feel like I'm getting a handle on the logic behind most of it. However, I've come across three statements that seem to be contradictory:
- In spacetime, the geodesic between two events maximises the time between those events.
- A free-floating object follows its geodesic, which (due to mass curving spacetime) is toward mass.
- Time is dilated close to mass, so less time passes for an object relative to one at a greater distance from the mass.
These seem mutually exclusive. How can a time-maximising geodesic point toward mass if doing so will decrease the time measured by the object?
Please tell me which (if not all) these statements I have misunderstood, or what is wrong with the conclusion I have drawn from them.
How do you explain gender to co-workers whose ability/willingness to think about gender and sexuality never goes beyond little quips like βAdam and Eve not Adam and Steve)β¦ I work with smart people that have degrees too, and still canβt engage in any deeper level of dialogue.
https://imgur.com/pyESF3h , I don't understand, even with the explanation, I don't get why the last two terms are cancelling
Link to Youtube videos are also welcome. Btw i have a good grasp of calculus
Same as title. What is the point where general relativity breaks.
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Take two objects with different masses at rest (at infinity if needed). What is the proper time that each object perceives before approaching a distance r due to gravity using general relativity (GR).
Can this be solved without assuming that one mass is much larger than the other? If so, can you point me to the solution?
I am just interested in the dependence in the masses. Is it unsolvable because most two-body problems in GR are unsolvable?
