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  2. Learn Time Dilation and Redshift for a Static Black Hole -...

    www.physicsforums.com/insights/time-dilation-redshift...

    The redshift would be z=104,962.52 (550 nm (green) would be at 57,729,938 nm or 57.730 mm, which would put it in SHF, Super high-frequency radio waves). Within the last 5 mm as you reached the event horizon, you would shift through medium to a very low frequency to infinite wavelength, and time dilation would go from 3 days passing in 3 seconds ...

  3. What's the G-forces in a black hole event horizon? - Physics...

    www.physicsforums.com/threads/whats-the-g-forces-in-a...

    If you mean what is the gravitational force (eg. relative to 'g' at the Earth's surface) this is easy to work out. F = Gm1m2/r^2 and F=m1a so a=Gm/r^2 where m is the mass of the black hole and r is it's radius. You have the formula for the radius of the event horizon for a given mass of black hole so you can work out how the 'surface gravity ...

  4. Q: Black hole event horizon vs distortion effects - Physics...

    www.physicsforums.com/threads/q-black-hole-event-horizon...

    According to current scientific understanding, the event horizon of a black hole cannot change in size. It is determined by the mass and spin of the black hole, and these properties are thought to remain constant. However, the distortion effects near the event horizon may change as the black hole consumes matter and grows in mass.

  5. "If a black hole has more mass then the event horizon shrinks"

    www.physicsforums.com/threads/if-a-black-hole-has-more...

    Under normal circumstances, the event horizon of a black hole does not shrink. It can only grow as the black hole gains mass. However, in theoretical scenarios involving Hawking radiation, a black hole could lose mass over extremely long periods, potentially causing the event horizon to shrink.

  6. Black Hole Event Horizon: Atom Effects & Wave Detection - Physics...

    www.physicsforums.com/threads/black-hole-event-horizon...

    A black hole event horizon is the boundary around a black hole where the gravitational pull is so strong that nothing, including light, can escape. Beyond this point, the escape velocity exceeds the speed of light, making it impossible for anything to escape the black hole's grasp.

  7. Schwarzschild Radius vs Event Horizon: Black Hole? - Physics...

    www.physicsforums.com/threads/schwarzschild-radius-vs...

    In summary: The event horizon of a non-rotating black hole is a surface at the Schwarzschild Radius:In Schwarzschild chart, at a given fixed coordinate time , it is the set of events/points having the same and varying coordinates.If we let coordinate time to change then it should be actually a 3D hypersurface.Note that Schwarzschild coordinates ...

  8. Is crossing a black hole's event horizon possible? - Physics...

    www.physicsforums.com/threads/is-crossing-a-black-holes...

    4. As I understand things if you're hanging out in your space suit some distance away from a black holes event horizon and your buddy decides to dive on in you will never see him cross the event horizon. You'll see him approach the event horizon but never cross it. It would seem the time needed to cross the event horizon would be infinite.

  9. What does the equation C = 12 J mean for black holes? - Physics...

    www.physicsforums.com/threads/what-does-the-equation-c-12...

    2. How is the equation C = 12 J related to the event horizon of a black hole? The event horizon of a black hole is the point of no return, beyond which nothing, including light, can escape. The equation C = 12 J is directly related to the size of the event horizon and indicates the maximum amount of energy that can be emitted from that point. 3.

  10. Black hole event horizon confusion - Physics Forums

    www.physicsforums.com/threads/black-hole-event-horizon...

    This light signal will never escape to infinity; it will remain stuck on a 2-sphere with that same surface area forever. In fact, that light signal lies on the event horizon, and the instant of its reaching the object's surface marks the instant at which the object has collapsed within its own event horizon and the black hole is fully formed.

  11. Black Hole and the event horizon - Physics Forums

    www.physicsforums.com/threads/black-hole-and-the-event...

    At the event horizon, the gravitational pull of the black hole is so strong that time and space are severely distorted. This means that time slows down and objects appear to be stretched out as they get closer to the event horizon. Once something crosses the event horizon, it is pulled into the black hole and cannot escape.