5259 Views
4472 Views
4959 Views
3809 Views
2671 Views
3236 Views
According to basic quantum theory, there is collision between the molecules of reactants and that of photons of the radiations. The collisions are of the following three types.
1) Elastic Collision: In this collisions, when the photons are colliding the, molecules neither gain nor loose the energy. This is perfectly elastic collisions and the scattered radiations will have the same frequency as that of incident and is known as Rayleigh scattering.$$ { \nu }_{ scattered }={ \nu }_{ incident } $$
2) InElastic Collision: In these types of collisions the photon either gains the energy or looses the energy:
a) At the time of collisions photons lose their energy to molecules so than the scattered radiations will have less energy, means ( { \nu }_{ scattered }\) is less than \({ \nu }_{ incident }\).$$ { \nu }_{ scattered }<{ \nu }_{ incident } $$This results in Stokes lines.
b) During the collisions molecules lose energy to photons, so the scattered radiation will have more energy means \( { \nu }_{ scattered }\) is more than \({ \nu }_{ incident }\).$$ { \nu }_{ scattered }>{ \nu }_{ incident } $$This results in the Antistokes lines.
3144 Views
9258 Views
1577 Views
2439 Views
1626 Views
Apply to join the passionate instructors who share their expertise and knowledge with the world. You'll collaborate with some of the industry's best producers, directors, and editors so that your content is presented in the best possible light..