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Message: <blockquote data-quote="Umbran" data-source="post: 2671078" data-attributes="member: 177">Nope, it can't <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile    :)"  data-smilie="1"data-shortname=":)" />  Above, you fall into the trap of thinking about light as a normal physical object.  If you toss a ball near a massive object, it'll speed up and slow down as you describe, but light is not a rubber ball.What happens to the ball is that it gains energy while falling towards the massive body, and loses energy when falling away.  The speeding up and slowing down is a result of that energy gain and loss.Light will also gain and lose energy, like the ball.  But, having no mass, the speed of the light cannot vary.  So, instead, the light changes wavelength.  It shifts towards the blue while falling inwards, and shifts to the red when falling away.Fuindorm: I'm sorry, but you've got the time thing backwards.  Remember - time is relative. To a local observer, his own clock always seems to run normally.  It's everyobdy else's clocks that change.Take two clocks.  Keep one yourself.  Hand another to your friend, and drop him into the black hole (well, don't use a good friend for this).You look at your clock, and it seems to be running normally.  You take a telescope and look at your friend's clock, and it will seem to be running more and more slowly.  The light reflecting off the clock face gets more and more red - from your perspective it's got fewer and fewer oscillations per second, a lower frequency.  His clock ticks more and more slowly, and eventually, just as he reaches the Event Horizon, the ticks are infinitely far apart, and you never see the last one.  From your point of view, he never actually falls into the hole.  He can't, because time would have to pass for him to cross the threshold, his clock would have to advance, but he's frozen with the next tick off at forever...From his own point of view, though, his clock keeps ticking just fine.  But if he looks up at your clock, it seems to be speeding up!  Ticks come faster and faster.  The light falling in towards him has more and more oscillations per second, so it looks more and more blue.  He just falls into, and through, the Event Horizon normally.  From his point of view, it's the rest of the Universe that's speeding by.</blockquote>

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