Physics

Alnico Definition Alnico is a powerful permanent-magnet alloy containing iron, nickel, aluminum, and one or more of the elements cobalt, copper, and titanium. Alnico alloys…

Magnetic Storage Definition Magnetic storage is a form of non-volatile storage. It is the manipulation of magnetic fields on a medium in order to record…

Pulsar Definition Pulsar is A rapidly spinning neutron star that emits radiation, usually radio waves, in narrow beams focused by the star’s powerful magnetic field…

Radio Telescope Definition Radio Telescope is an instrument that consists of a radio receiver and antenna system mounted on a wide, bowl-shaped reflector, used to…

About Radio Frequency Definition Radio Frequency (RF) is a frequency or band of frequencies that lie in the range 10 kilohertz to 300 000 megahertz…

About Radio Astronomy Definition Radio astronomy is the study of celestial objects by measurement of the radio waves they emit. It has enabled the detection…

Sunspot Definition Sunspots are easily recognized as speckles on the surface of the sun. Sunspots appear dark because they are cooler, by up to 1,500°K,…

About Photosphere Definition Photosphere is the lowest visible layer of a star, lying beneath the chromosphere and the corona. The term itself is derived from…

Chromosphere Definition Chromosphere is a glowing, transparent layer of gas surrounding the photosphere of a star. The Sun’s chromosphere is several thousand kilometers thick, is…

Ionization Definition Ionization is when an atom becomes an ion, by either gaining or losing electron. Unstable do atoms of an element become when ionized.…

Mesosphere Definition Mesosphere is the region of the Earth’s atmosphere lying above the stratosphere and below the thermosphere, from a height of about 50 km…

Thermosphere Definition Thermosphere is the region of the Earth’s upper atmosphere lying above the mesosphere and extending from a height of approximately 80 km (50…