Hawking Radiation is the radiate light from the event horizon of black hole. Stephen Hawking says that black hole is not quite black, rather it radiate energy from the event horizon, which is the boundary of black hole.
Gravitational lens Gravitational lensing can be define as a phenomenon that is exactly a distribution of matter between distant light and observer. Gravitational lens can bend light coming from light source to the observer. The effect of gravitation is known as gravitational lensing. With the effect of gravitational lensing, what amount of the light will be bend is predicted by the general theory of relativity
Cosmic Microwave Cosmic Microwave Background is a electromagnetic radiation during the stage of Big Bang, the initial expansion of universe. Cosmic Microwave Background is also known as the relic radiation or cosmic microwave background radiation.
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