It has been done and reported on Briefly slowing light to a stop involved a very cold tube of something through which the light was directed Mr Google and Miss Chrome will be a lot more helpful with a lot more detail Please Register or Log in to view the hidden image!
We have to be a bit careful in interpreting those experiments, which use ultra-cold gases of atoms. The speed that is being referred to is what's called the group velocity of the light, which is different from the phase velocity. I don't think those experiments bring a single wavelength of light to a stop.
Link https://www.nytimes.com/2001/01/18/...ull-stop-hold-it-then-send-it-on-its-way.html I think this is a different article I read. Does not have the same look I recall the article I read Articles I read some time ago may have been by Dr. Hau who went on to stop light soon after Extract from this article Two years ago, however, Nature published Dr. Hau's description of work in which she slowed light to about 38 miles an hour in a system involving beams of light shone through a chilled sodium gas. You will need to read this to satisfy your query group velocity of the light, which is different from the phase velocity More coffee needed Please Register or Log in to view the hidden image!
A simple Dr Hau stop light experiment placed in Mr Google brings up the following https://sciencenordic.com/computers...moves-it-around-and-makes-it-reappear/1408618 Extract In 1999 the Danish physicist Lene Hau managed to slow down the fastest thing we know: light. Since then she has continued her work with light at Harvard University. In her latest experiment, she not only stopped the light but also moved it around, manipulating it for half a minute, before she made it reappear. Please Register or Log in to view the hidden image! Mr Google greets me "What do they want now?" Please Register or Log in to view the hidden image! Please Register or Log in to view the hidden image! Please Register or Log in to view the hidden image!
Reminded me of a poem I wrote years ago, may even have posted it in the poem thread Found a torch other day Had a switch went two way Push it forward out came light Very shinny very bright Slide it back out came blackness Very dark very black Found a torch other day Anyway my understanding is Black Holes absorb light which fall into its gravity well and absorb the light's kinetic energy, hence no reflection Guess destruction of light would be considered stopped. Scientists really want to stop light to study followed by starting it again Please Register or Log in to view the hidden image!
Nothing Light only has kinetic energy No mass https://www.uwsp.edu/cnr-ap/KEEP/nres633/Pages/Unit1/Section-B-Two-Main-Forms-of-Energy.aspx It is a bit of the way down but you will find this Light is an example of electromagnetic radiation and has no mass, so it has neither kinetic nor potential energy. Please Register or Log in to view the hidden image! 00:30am 14 Jan far to early for coffee
It would have to be truely non reflective in which case it would absorb the kinetic energy of light and heat up It should not be said to reflect light as heat but to have absorbed lights kinetic energy and converted said energy into heat which it radiated out as of its own Although that could be a difference without a distinction Please Register or Log in to view the hidden image!
06:11 am 14 January coffee finished breakfast finished now thinking about the fence repair i need to do & wondering if i have forgotten something because it feels like i have.
Now 3am Darwin time Thunder keeping me awake no rain May as well do something Please Register or Log in to view the hidden image! If get tired enough can sleep all day tomorrow, well as long as bladder holds out Please Register or Log in to view the hidden image! Please Register or Log in to view the hidden image!
No. Interestingly, what a black hole does is that it bends space so much that once light crosses the event horizon it can only travel towards the centre of the hole; outward paths are no longer possible. The energy of the light ends up manifesting as an increase in mass of the hole. From another perspective (frame of reference), light falling into a black hole never actually crosses the event horizon, so all "information" in the light remains at the surface of the hole, in some sense. We don't see light from the horizon (hence black hole) because light propagating outwards from there is red-shifted so such a degree that it would have no energy by the time it reached us (outside the hole). I personally wouldn't describe it as kinetic energy, though that's not unreasonable. The energy of light obeys somewhat different rules to the kinetic energy of massive particles. Yes, it absorbs the light and heats up a little in the process. There are some interesting youtube videos about the blackest available paints, which are very very black indeed. They absorb well over 99% of the incoming light.
