if black holes prevent light from emerging dosen't it change speed?

Question

How can light go from 186,000 MPS to zero without changing speed? Is there something wrong with black hole theroy or the Einstienian contention that the speed of light is constant.

Answer 1

one way to understand your perplexing question is that the light is always traveling at the same speed but traveling in longer and longer paths near the blackhole ( due to being bent by traveling thru curved space.)

ultimately, the cannot escape because the space around the blackhole is curved into itself. in other words, the light loops back into the blackhole.

curved space is difficult to visualize. watching light bend around blackholes is one way of conceptualizing this idea.

light never changes its speed. its very definition is that it moves at a fixed velocity. it doesnt have to move in straight lines however if the medium it travels in is not straight (e.g. curved space ).

the apparent change in speed that you describe is a perceived effect of the light taking longer to move thru what you "see" as non-curved space ( when it is actually curved ).

hope it shed light !

Answer 2

Einstein considers gravity to be a curvature of space-time in which light always goes 186,000 miles a second in a straight line. It is analogous to, but not exactly the same as, an airplane flying over the equator heading due west. It never turns north or south but its path in 3 dimensional space ends up being a circle, just like the Earth's equator. In a black hole, curvature of space-time is so strong that it can make light curve it back into the black hole before it can escape.

Answer 3

Light doesn't go from 186,000 mps to 0. It is captured by the strong gravitational field of the black hole, and that doesn't mean it is stopped. It just absorbs the light, because, as you probably know, light gets bent by gravity. So, you can imagine the light being "bent" by the black hole, and, in turn, being sucked into it.

Answer 4

The gravity of a black hole prevents light from escaping. Not enough speed for escape velocity.

Answer 5

to point it out of course one extra time: the community speed of light is the comparable everywhere. that consists of a quantity element 1um faraway from the form horizon of a black hollow. besides the indisputable fact that, a black hollow is a ability nicely and the valuable ability at its adventure horizon is countless. All gentle emitted on the form horizon will therefor be pink-shifted to 0 means and can by no ability get away. yet this would be a simplified photograph, of path. truly what happens is that the observers community gentle cone gets squashed and turns around. So as quickly as you're decrease than the even horizon, your destiny constantly lies in the direction of the singularity. on the form horizon your destiny does no longer lie exterior of the form horizon any further. And fairly above the even horizon your destiny is quite small and in basic terms lies above the form horizon in case you may shed some (plenty) of their mass-means in an attempt to flee. all people else is already in an elevator occurring.

Answer 6

I think you are misunderstanding Einstein's contention. You will measure the speed of light to be the same in all frames of reference, it does not have to be the same speed everywhere. For example, light travels much slower through some things than through others. It travels fastest through a vacuum.

Answer 7

Exactly, I've been trying to convince people that there are speeds faster than 186,000 miles per second.

Answer 8

The curvature answer is the correct one. It's not so much a matter of light moving slowly as it is of there being no path whereby light can emerge.

Answer 9

Light doesn't escape from your room with all the doors and windows closed either. Maybe you should do more research.