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Thread: Stephen Hawkings Dead at 76

  1. #1
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    Stephen Hawking Dead at 76

    Rest in peace Stephen Hawking...your life exceeded all expectations, your science changed and integrated our understanding of the universe and your humor showed us your down to earth humanity!

    M
    Last edited by matsickma; 03-14-2018 at 02:45 PM. Reason: Spelling error

  2. #2
    Just to correct the typical reports, Hawking radiation does not escape from inside black holes. It is just one of the virtual particle pairs escaping from just outside the horizon of a black hole. That is, if it exists. It has never been observed.
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    Super Moderator chazmo's Avatar
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    Tough loss for science, and the world... It has always been astonishing to me how he achieved so much while overcoming his disabilities. RIP, Dr. Hawking.
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    Senior Member killdeer43's Avatar
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    RIP, indeed, to one of the great minds of our time, and an inspiration to all who are physically challenged.

    Joe

    *Just for the record, it's Hawking...
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    Senior Member walrus's Avatar
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    RIP. Genius.

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  6. #6
    +1 and thanks for showing mankind what the potential of a human brain can be.
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  7. #7
    R.I.P. What a gift to mankind he was. The Big Bang Theory will never be the same.

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  8. #8
    Quote Originally Posted by Cougar View Post
    Just to correct the typical reports, Hawking radiation does not escape from inside black holes. It is just one of the virtual particle pairs escaping from just outside the horizon of a black hole. That is, if it exists. It has never been observed.
    One variant of this is that whenever a virtual particle pair pops into existence just outside a black hole's event horizon, one of the particles can zip away from the horizon while the other falls in. The particle that falls in can be described mathematically as carrying negative energy into the black hole, thus reducing its mass. As esoteric as it sounds, it comes from trying to understand what's going on with gravity at very small scales.

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  9. #9
    Today

    Stephen Hawkings dies at Pi Approximation Day - which is also the birthday of Albert Einstein

    Hawkings was born on January 8 - the day Galileo Galilei died.


    Coinsidence ???

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  10. #10
    Quote Originally Posted by Quantum Strummer View Post
    One variant of this is that whenever a virtual particle pair pops into existence just outside a black hole's event horizon, one of the particles can zip away from the horizon while the other falls in. The particle that falls in can be described mathematically as carrying negative energy into the black hole, thus reducing its mass. As esoteric as it sounds, it comes from trying to understand what's going on with gravity at very small scales.
    Yes, I've heard that way of looking at it, which obviously balances the equations. Another way is that the intense gravity near the horizon of the BH separates the virtual pair. If one falls in, as you mention, we now have a real particle outside the BH, which cost that amount of gravity used to separate the pair. Thus, as you say, this reduces the mass and eventually evaporates the BH. Suggested reading: Black Holes and Time Warps, Einstein's Outrageous Legacy [1994] -- Kip Thorne. If only the first chapter! (Which IIRC, was kind of in a science-fiction setting....)
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