GENERAL KNOWLEDGE

Detailed explanation-1: -Astronomers spot them when another star draws near enough for some of the matter surrounding it to be snared by the black hole’s gravity, churning out x-rays in the process.

Detailed explanation-2: -So black holes can also often be found and studied by looking for bright sources of X-rays and radio waves in the sky. There are many other types of electromagnetic radiation as well. Radiation that has even smaller wavelengths (and even higher energies) than X-rays is called gamma-rays.

Detailed explanation-3: -Physicists have discovered that the ring of photons orbiting a black hole exhibits a special kind of symmetry, hinting at a deeper meaning. The photon ring, which glows orange in this visualization of light flowing around a black hole, contains a succession of images of the entire universe.

Detailed explanation-4: -Although light can’t escape a black hole’s event horizon, the enormous tidal forces in its vicinity cause nearby matter to heat up to millions of degrees and emit radio waves and X-rays.