Could a microscopic black hole suck the whole Earth?

[MigL]

Are you done banging your head against the wall, Strange ?

 

Whether you like it or not, Sorcerer, the laws of physics continue to apply near and inside the event horizon.

It is only close to and at the possible singularity that our physics cannot make predictions anymore.

 

A massive object is therefore constrained to always move subluminally. The only way it could reach light speed is if it started at infinity in an empty universe, and as you've stated, that is impossible.

Outside the event horizon you will 'see' any photon move away from you, and towards the BH, at the SoL, but getting more and more red-shifted, until it goes totally black at the horizon ( infinite wavelength, zero frequency ).

We cannot discuss anything from the frame of reference of the photon because there is no valid frame for massless particles that always move at the SoL.

A third observer may 'see' the photon moving towards the BH ( still at the SoL ) and you, moving at an appreciable fraction of the SoL, right behind it. And since the photons coming back at the third observer from you are a signal, and therefore frequency/wavelength shifted, he will 'see' you moving slower and getting more red-shifted until you finally disappear at the event horizon.

 

Make no mistake though, you have crossed the event horizon and are rushing towards the only thing in your fture, the possible singularity.

 

Inside the horizon you will not be able to 'see' the photon which may be right in front of you, as the photon cannot move backwards towards your eyes. The only thing in its future is also the possible singularity. Similarly, if the third observer was foolish enough to follow you through the horizon, he will not be able to 'see' you, even if only a meter behind you.

If you turn around as you fall towards the possible singularity though, you will 'see' the third observer's light signal, but blue-shifted to a much higher frequency/shorter wavelength.

Because of this frame effect, you should be able to 'see' the future history of the universe unfold behind you, in the brief time it takes you to reach the possible singularity.

 

An excellent 'layman' book is Kip Thorne's "Black Holes and Time Warps: Einstein's outrageous Legacy".

It contains little math but is not prone to 'flights of fancy' like many other pop-sci books.

Give it a read, Sorcerer.

Edited August 19, 2015 by MigL