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General Knowledge for Competitive Exams

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All about the Space Hurricane spotted over North Pole

Mar 18, 2021
A 620-mile-wide swirling mass of plasma was observed rolling for almost 8 hours in the Earth's upper atmosphere. This is called space hurricane by the scientists. Know all about it below. 


Mar 18, 2021
Precipitation occurs when a portion of the atmosphere becomes saturated with water vapour, so that the water condenses and "precipitates".

Weather Disturbances

Mar 18, 2021
Weather is the state of the atmosphere, to the degree that it is hot or cold, wet or dry, calm or stormy, clear or cloudy.

Compton Scattering

Sep 14, 2012
Compton observed the scattering of x-rays from electrons in a carbon target and found scattered x-rays with a longer wavelength than those incident upon the target.  

Rutherford Scattering

Sep 14, 2012
Rutherford Scattering is a phenomenon explained by Ernest Rutherford in 1911

Scattering Theory

Sep 14, 2012
In mathematics and physics, scattering theory is a framework for studying and understanding the scattering of waves and particles.


Mar 29, 2011
The pressure exerted by the atmosphere as a result of its weight, above a unit area of the earth’s surface is called atmospheric pressure. It is expressed in millibars (mb) and measured.

Atmospheric Circulation

Sep 15, 2012
Atmospheric circulation is a movement of air at a larger scale by which the earth's surface is covered and distributed over by thermal energy

Refractive Index: Phase Speed

Sep 21, 2012
The refractive index can be defined as the ratio of the speed of light in vacuum and the phase speed of light in a material.


Mar 29, 2011
Cloud is a mass of minute droplets of water or tiny crystals of ice formed by the condensation of water vapour in free air at  considerable elevations.

Refraction and Reflectivity

Sep 14, 2012
The refractive index is retrieved from direct phase and amplitude measurements for transmission and reflection, which are all in excellent agreement with simulations. The reflection angle is equal to the incidence angle, and the amount of light that is reflected is determined by the reflectivity of the surface.

Single and Multiple Scattering

Sep 14, 2012
Single and multiple scattering contributions to the circumsolar radiation along the almucantar and sun vertical have been computed by a Gauss-Seidel solution to the radiative transfer equation.

Electromagnetic Scattering

Sep 14, 2012
Electromagnetic scattering is the physical effect of an electromagnetic wave, such as light or radio waves, hitting an object


Mar 29, 2011
The vast expanse of air which envelops the earth all around is called the atmosphere. It extends to thousands of kms. It protects the earth’s surface from the sun’s harmful, ultraviolet rays. It also regulates temperature, preventing the earth from becoming too hot or too cold. The major constituents of air in the atmosphere are Nitrogen (78%), Oxygen (21%), Argon (0.93%) and Carbon dioxide (0.03%). Besides water vapour, dust particles, smoke, salts and other impurities are present in air in varying quantities. On the basis of temperature, the atmosphere is divided into five layers:

Earth’s heat budget and its radiation balance

Nov 29, 2014
Earth's heat-budget or Earth's radiation balance refers to the net flow of energy into Earth in the form of shortwave radiation and the outgoing infrared long-wave radiation into space.

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