Quote:
Originally Posted by nushaganazad
i just dont agree, ive never had someone bring plain good evidence to me and show me. all things give off light, do u have any credible sources?
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Basically, anything with a temperature greater than absolute zero will radiate. Due to quantum effects, it is not actually possible to get to 0 K.
Light is an ambiguous term. If you consider light to be what is visible to us, then all object most definitely do not give off light. But if you consider the whole electromagnetic spectrum (microwave, x-ray, gamma ray etc.), all objects do radiate.
Black holes have even been shown to radiate, again this is theorized to be due to quantum fluctuations.