Andrew D

2010-Feb-14, 01:33 AM

ReadingTommac's thread (http://www.bautforum.com/space-astronomy-questions-answers/100620-how-can-black-hole-form.html) and Grimble's thread (http://www.bautforum.com/space-astronomy-questions-answers/100517-musings-speed-light.html), I've come up with a few questions of my own, I decided to make a new thread as not to hijack theirs.

1. What do we know about the behavior of light inside of the EH of a BH?

1a. Imagine the flashlight falling toward the EH from outside of it, shining a beam of light tangent to the EH. What I assume is that the light beam would bend more and more as the flashlight approached, at the EH the light would bend along the EH, and below the EH the light would bend enough to 'shine' down toward the singularity. Is this correct?

1b. Obviously, gravity bends photons like it does any other particle (i.e. gravitational lensing). So would photons from a flashlight shined from the interior of the EH toward the outside 'bend' back to the center, or just become red-shifted 'infinitely' and never 'escape', but maintain the same path? (My intuition tells me the first is true for photons with angular momentum, but the second is true for photons traveling against the gradient)

1c. If it is important whether or not the photons are traveling perpendicular to the gravity gradient (away from the singularity), then what is the difference in behavior between photons travelling perpendicularly and those with angular momentum?

2. What would an observer see inside the EH (lets assume the EH was a sufficient distance away from the singularity that an observer had time to actually observe)?

2a. Wouldn't the direction away from the singularity appear extremely blue-shifted, and become more blue-shifted as the observer got closer to the singularity?

2b. Wouldn't the direction toward the singularity appear just as red-shifted as the EH appears to an outside observer?

2c. Following that logic, wouldn't space within the radius of the observer appear (to the observer) as though it was the EH, such that the observer would see himself embedded in a black horizon, extreme darkness (red-shifted) in front of him, and a blue-shifting universe behind him?

3. What exactly is the difference between 'velocity induced' time dilation and gravitational time dilation? As an object has more mass the faster it travels, are they the same effect, in that the increased gravitational field of the object is causing the time dilation? Or, conversely, is the increasing time dilation of an object responsible for its increase in mass ( i.e. charge over wire = magnetic field, and magnetic field over wire = charge)?

I assure you I'm asking out of curiosity and an eagerness to understand, and I'm not cooking up and crazy ATM ideas.

Also, If any questions require parameters that I have not specified, I apologize. Just assume the obvious, show an example from one perspective, or tell me what you need, etc.

1. What do we know about the behavior of light inside of the EH of a BH?

1a. Imagine the flashlight falling toward the EH from outside of it, shining a beam of light tangent to the EH. What I assume is that the light beam would bend more and more as the flashlight approached, at the EH the light would bend along the EH, and below the EH the light would bend enough to 'shine' down toward the singularity. Is this correct?

1b. Obviously, gravity bends photons like it does any other particle (i.e. gravitational lensing). So would photons from a flashlight shined from the interior of the EH toward the outside 'bend' back to the center, or just become red-shifted 'infinitely' and never 'escape', but maintain the same path? (My intuition tells me the first is true for photons with angular momentum, but the second is true for photons traveling against the gradient)

1c. If it is important whether or not the photons are traveling perpendicular to the gravity gradient (away from the singularity), then what is the difference in behavior between photons travelling perpendicularly and those with angular momentum?

2. What would an observer see inside the EH (lets assume the EH was a sufficient distance away from the singularity that an observer had time to actually observe)?

2a. Wouldn't the direction away from the singularity appear extremely blue-shifted, and become more blue-shifted as the observer got closer to the singularity?

2b. Wouldn't the direction toward the singularity appear just as red-shifted as the EH appears to an outside observer?

2c. Following that logic, wouldn't space within the radius of the observer appear (to the observer) as though it was the EH, such that the observer would see himself embedded in a black horizon, extreme darkness (red-shifted) in front of him, and a blue-shifting universe behind him?

3. What exactly is the difference between 'velocity induced' time dilation and gravitational time dilation? As an object has more mass the faster it travels, are they the same effect, in that the increased gravitational field of the object is causing the time dilation? Or, conversely, is the increasing time dilation of an object responsible for its increase in mass ( i.e. charge over wire = magnetic field, and magnetic field over wire = charge)?

I assure you I'm asking out of curiosity and an eagerness to understand, and I'm not cooking up and crazy ATM ideas.

Also, If any questions require parameters that I have not specified, I apologize. Just assume the obvious, show an example from one perspective, or tell me what you need, etc.