Chemical reactions which involves both oxidation as well as reduction process simultaneously, are known as redox reactions (‘red’) from reduction...

Atom John Dalton proposed (in 1808) that atom is the smallest indivisible particle of matter. Atomic radii are of the order of 10-8cm. It contain three su...

Chemistry It is the branch of science which deals with the composition, structure and properties of matter. Antoine Laurent Lavoisier is called the fat...

Displacement Current It is a current which produces in the region in which the electric field and hence the electric flux changes with time. Displaceme...

It is the branch of science which deals with the electron flow through a vacuum, gas or semiconductor. Classification of substances on the basis of co...

Nucleus The entire positive charge and nearly the entire mass of atom is concentrated in a very small space called the nucleus of an atom. The nucleus...

Dalton’s Atomic Theory All elements are consists of very small invisible particles, called atoms. Atoms of same element are exactly same and atoms o...

Cathode Rays Cathode rays are the stream of fast moving electrons. These rays are produced in a discharge tube at a pressure below 0.01 rom of mercury....

Wave optics describes the connection between waves and rays of light. According to wave theory of light, the light is a form of energy which travels through...

Light Light is a form of energy eyes. which produces the Sources of light are of three types-thermal sources and luminescent sources. Photome...