properties and changes of properties in matter

Summary - When a ray of light is incident on a boundary separating the two media having different densities: A part of the light gets reflected. Rest of the light changes its direction as it enters the second medium. The change of direction suffered by a ray of light as it passe..

Brownian movement - When a colloidal solution is viewed through a powerful microscope, the colloidal particles can be seen moving in a random zig-zag path. This zig-zag motion of colloidal particles is called Brownian movement. This random motion is due to collisions between the colloidal particles..

Boiling - Vapour pressure measures the tendency for the molecules to escape from liquid to the gas phase. At lower temperatures the vapour pressure of a liquid is much lower than the pressure on the surface of the liquid. When the temperature of the liquid is gradually increased, its vapour pressur..

Sulphur dioxide gas exhibits bleaching properties in presence of moisture. It dissolves in water liberating nascent hydrogen. Coloring matter is bleached by reaction with nascent hydrogen. Nascent hydrogen removes oxygen atoms from the coloring matter (reduces coloring..

1) No point can be at different potentials, so equipotential surface for different potentials can never touch or intersect. 2) Potential energy does not change as a test charge moves over an equipotential surface and hence the electric field can do no work on such a charge. Because of th..

Amino acids are colourless, crystalline solids. They are water-soluble high melting solids and behave like salts. The a -carbon atom has 'R' which is a side chain. This side chain is different for different amino acids. The carboxyl and amino groups interact resulting in the transfer of proton fr..

Properties of Solids - Electrical Properties - Properties of solids have been exploited for various new innovations in electronic and magnetic devices like transistors, computers, telephones etc. Properties of the solids mainly depend upon their structure and..

Properties of solids have been exploited for various new innovations in electronic and magnetic devices like transistors, computers, telephones et..

Dual Nature of Matter and Radiation - Light has been regarded as waves to explain the phenomena of reflection, refraction, diffraction etc. However in 1905, Albert Einstein suggested that light has a dual character, which means, it can behave as a particle as well as a wave. It was observ..

Gases, as well as mixture of gases, behave as seen above, with regard to changes in temperature, pressure or both. The following assumptions can be made on the basis of the kinetic theory of gases: A molecule of a gas means the smallest unit of a gas that can exist independently. It may c..