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If matter shrinks as it reaches the speed of light, does it expand again when slowed down?
Öand does time slows down the closer to the speed of light matter gets?
Öand finally I have read an article regarding photons having mass, if they have mass, do they not act in the same way as matter at the speed of light.
what I meant by "and finally I have read an article regarding photons having mass, if they have mass, do they not act in the same way as matter at the speed of light." is that if matter shrinks the closer to the speed of light it gets and it grows again when it slows again, then if does a photon get larger when it is slowed or even stopped?
Didn't Lene Hau in 1999 succeed in slowing light down? and then was there not and experiment that succeeded in stopping light -- accomplished by two teams.
To stop the light, the physicists used a glass-like crystal that contains a low concentration of ions -- electrically charged atoms -- of the element praseodymium. The experimental setup also includes two laser beams. One is part of the deceleration unit, while the other is to be stopped. The first light beam, called the "control beam," changes the optical properties of the crystal: the ions then change the speed of light to a high degree. The second beam, the one to be stopped, now comes into contact with this new medium of crystal and laser light and is slowed down within it. When the physicists switch off the control beam at the same moment that the other beam is within the crystal, the decelerated beam comes to a stop.