His energy elements had to have a definite size – the product of the frequency under consideration and a constant h, today known as Planck’s quantum of action. Planck succeeded in deriving a radiation ...

All types of radiation become less intense as they travel further away from the radioactive material. This is because the particles or rays become more spread out. The thicker the substance ...

That concept, which came to be known as Hawking radiation, explained how energy and even matter could escape the immense gravitational pull of a black hole. On Wednesday, Hawking died at the age ...

It does this by emitting a high energy electromagnetic wave called a gamma ray. Gamma radiation does not consist of particles but as short wavelength, high energy electromagnetic radiation emitted ...