This diagram helps us deeply understand black holes - and you already know it! #shorts #physics

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This diagram helps us deeply understand black holes - and you already know how to draw it!

If you draw a position-time diagram, you can show how objects move through empty space. One example is showing the motion of a photon. However, this line ends up being very shallow because light moves very fast. So if we multply the time axis by the speed of light, c, then the motion of light is a nice 45 degree line on our graph.

Interestingly, this diagram can also be used to represent the inside and outside of a black hole. The region to the bottom right of our photon line represents the outside of a black hole, and the region to the top left represents the inside! We can understand this intuitively by trying to show how photons would move if released from any point on either side of the photon line.

If we're outside the black hole, we can send photons to other regions outside, as well as inside the black hole. However if we're inside, then we CANNOT send any communications outside the black hole at all.

#blackhole #physics #understandingphysics #parthg #science #relativity #intuition #cosmology #eventhorizon #speedoflight #spaghettification