Why do all objects in the universe(besides a black hole)reflect or emit radiation of some type???

Question

...tom science

Answer 1

(Hawkings)The black hole emits radiation.

Answer 2

Some clarifications: Blackholes have been hypothesized to emit "Hawking Radiation" but to date this has not been observed. Blackholes do NOT emit blackbody radiation since the photons could never escape a blackhole's event horizon. The Sun emits blackbody radiation (actually, the sun is a "gray" body, which means it's close to a blackbody emitter). And not all visible light in the universe necessarily comes from fusion. Don't quote me on it, but I think fusion releases too much energy to emit in the visible. The fusion really just provides the energy to heat up a star enough to emit a blackbody spectrum in the visible.

OK, now back to the main question. Different types of radiation can be reflected or emitted. Some nuclei (created in stars and supernovae) decay and give off gamma (high energy photons/light), beta (electrons or positrons), or alpha (He nuclei) radiation. These 'reflect' because their like high speed billard balls richocheting off other particles. Lower energy photons do the same. Some of them get absorbed by things, but some reflect/scatter. Since photons are also wave-like, they spread out around things (like waves hitting a boat). They all reflect just because of the different forces of nature, usually electromagnetic.

Answer 3

Not all objects reflect or emit radiation (that we can currently detect), which is why there are the terms dark matter and dark energy, which apparently comprise the majority of the universe but are yet unexplained.

Answer 4

All of the visable light in the universe is sourced by fusion - steadily emmiting radiation. Any object we can "see" is the result of that object reflecting this radiation, hense, all objects that we know of (including black holes) emit or reflect radiation.

Answer 5

More specifically, black holes have been theorized, then observed, to emit something called black-body radiation.

Answer 6

Unlike everything else, a black hole ABSORBS light / energy / matter.