/sci/ - Science & Math

Let's try and understand this. According to the theory of general relativity, gravity causes a deflection of light by the gravitational field of a massive body. The gravitational field of a massive object extends far into space, and cause light rays passing close to that object (and thus through its gravitational field) to travel along the curved path. Light does not actually "bend" but goes in a straight line along the curved space caused by the gravitational field.
>>9919858

>>7983317
>aha, so you Think that if a huge "Gravity" field is applied to a clock, and the clock then starts to show time slower. Is it then Time it self that is being slowed down, or the mechanics inside the clock that is being affected by a centrifugal force?
No if you sent a clock into the orbit around a black hole for a year and then took it out of the orbit, the time that the clock would display would be a lot less than experienced outside of it's orbit.

>So what your saying is that a huge mass, will bend how we humans experience the passage from our current point in space, to the next?
All reference points in space time are valid so this question doesn't make sense. No matter how distorted the space time is that you occupy is, you will still experience normal time.

>And Gravitational redshift, how does this prove that the universe is expanding, and not just moving.
I mentioned grav redshift because it is one of the proofs of GR. It doesn't prove the universe is expanding, that's what Hubble's diagram does.

>Do you think our planet is expanding away from the sun, because we move in a orbit around it?
No, we are moving toward it, according to GR. But we are so far away from the Sun that the effect we experience because of gravity waves is so infinitesimal that it is practically impossible to observe


>>7983322
>i have yet to seen a single proof of gravity, or the theory of general relativity.
Procession of the periastron of Mercury, Gravitational waves, deflection of light around the sun, gravitational lensing. These are your proofs yet you refuse to accept them.

THE PIC IS FUCKING RELATED

Hi /sci/!
I have come to discover that my mind starts to deteriorate because I don't use mathematical thinking very often. All is coming too easy with calculators and computers and I dumb down. Actually lack of that thinking makes everyday planning much more harder for me without risking of making mistakes. So to improve my logical thinking and problem solving abilities I've decided to take on some math, calculus and geometry courses almost from the beginning.
Can anyone name any good online video step-by-step courses with good visual material and decent explanation? I might use it to engage my friends in the same activity.

Also I would like to find some basic courses , lectures and introduction to Einsteins general and special theory of relativity with tasks and visual material.

Thanks in advance!

This is interesting:
http://rein.pk/gravitational-lensing-to-observe-ancient-earth/

>To be reflected, so that we could see ancient Earth in the black hole, we’d need a deflection of 180 degrees, or pi radians. Looking at the graph you can see that this “reflection” happens near the asymptotic “edge” of the black hole.

And then there's this type of thinking:

>Rather than try to recover old photons that left earth long ago, can recover and collate the remnants of these photons. This might be possible if these photons left a holographic imprint on matter which is still present – buildings, old trees, rock formations. I envision that in the future there will be a field of "photonic archaeology" where scientists will reconstruct past images from these trace holographic signatures. Same thing could theoretically be done for acoustics.

What kind of batshittery is this???