Quantum Dots
Quantum dots (QDs) are human-made nanoscale crystals that can transport electrons. A quantum dot gets its name because it is a tiny spot of material…
Physics
Principle of Artificial Satellites operation
The principle of Artificial Satellites operation The satellite that is created by man based on this theory in order to go in the outer space…
Artificial Satellite
Artificial satellite are scientifically developed satellites projected in the space. We know there is a solar world at the center of which is the sun. Some…
Principle of Gamma Ray
Electromagnetic waves coming from planets and stars contain in addition to visible light, an infrared wave, short and long, radio waves, ultraviolet rays. X-rays and…
Principle of X-ray
Electromagnetic waves coming from planets and stars contain in addition to visible light, an infrared wave, short and long, radio waves, ultraviolet rays. X-rays and…
Optical Telescope
An optical telescope collects and magnifies visible part of the electromagnetic waves for the purpose of seeing the magnified image of the object, to take…
Radio Telescope
The radio telescope is a type of directional radio antenna which is used in radio astronomy. It is an instrument used to detect radio emissions…
Black Hole
Astronomers have shown by a mathematical model that when the mass of the star, just before the commencement of death, greater than about 3 Mo…
Neutron Star
Neutron stars are city-size stellar objects with a mass about 1.4 times that of the sun. If after the supernova explosion the mass of the…
Death of a Star
Death of a Star At night we see innumerable light points twinkling in the clear blue sky. These are called stars. Through naked eyes, we…
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