If matter traveling at the speed of light physically becomes light, what would happen to natural sunlight if it were slowed to less than the speed of light, theoretically?
No. the traditional velocity of darkish count debris is around 800 kilometers consistent with 2nd. it truly is the common random speed finished by darkish count while it falls right into a darkish count Halo, that's a gravitational properly formed by darkish count. Galaxies sort interior darkish count Halos, and so their residences are properly understood from learn of dynamics of galaxies (an entire graduate-point astronomy direction and too plenty to get into right here). This fairly low popular speed for darkish count is why the darkish count is noted as chilly, as in we are residing in a Lambda-chilly-darkish-count Universe. darkish count is darkish because of the fact it does not work together strongly with electromagnetic radiation, consistent with unit mass. it is truly not an fairly stringent constraint although. darkish count must be made up of bricks (i.e. stones approximately 200 mm in diameter) different than that: a million) we don't be attentive to how those stones must be made and a pair of) bricks or stones are made up of baryons, and there can't be that many baryons interior the Universe, or early nucleosynthesis (He and Li production interior the 1st couple of minutes) could be badly off.
Nothing with mass can reach the speed of light Nothing without mass like light can exist at any speed except the speed of light Photons cannot slow down EDIT: you got another answer that says light slows down in media. That is not technically correct. What happens is the photons get absorbed and reemitted by the atoms in the medium. Thus, the photons stop and start. The velocity between atoms is still c but the average velocity is less. It is like cars driving through a city withstoplights the cars stop at every light and go the speed limit between lights
Wrong assumption. Relativity says it would take an infinite amount of energy to accelerate even the smallest imagineable amount of matter to the speed of light, not that the matter becomes light. Interconversion between mass and energy has nothing to do with accelerating the mass to the speed of light, rather it is the anhilation or the mass, with the release of a corresponding amount of energy (that e=Mcsquared thing) and vice versa.
Light will always travel at the speed of light for the medium it is in. You can't slow down light to less than the speed of light. If matter and anti matter traveling at less than the speed of light annihilate the result will be electromagnetic radiation (i.e. light) traveling at the speed of light.
Actually, to the few others that answered your question above saying that light can't be slowed down, it can. That's why theres a term called the refractive index. As light travels through different mediums such as water, it slows down (slower than the air medium), and thus causes the refraction( which is why things look slightly distorted in water). Just hold up a glass of water towards the sunlight, and voila, you're slowing down light :).
