reverse photoelectric effect

The Photoelectric Effect - There are three ways in which electrons eject out of a material. They are (i) Thermionic emission (ii) Field emission (iii) Photo electric emission In all the above cases, energy is given to the material but in different forms. If given in the form of ..

There are three ways in which electrons eject out of a material. They are (i) Thermionic emission (ii) Field emission (iii) Photo electric emission In all the above cases, energy is given to the material but in different forms. If given in the form of heat it is called as Thermionic emission, if in..

Dual Nature of Radiation and Matter..

This effect is named after common Johann Seebeck, a German physicist, who discovered it in 1821. He found that Bismuth, are joined at their ends (called a junction) through a sensitive galvanometer, and the two junctions are kept at different temperatures, then the galvanometer shows a de..

Plants vary greatly in response to light with respect to seed germination. Seeds which respond to light for their germination are named as photoblastic . Non-photoblastic seeds germinate irrespective of the presence or absence of light. For the light sensitive seeds, the red region of the visible s..

The Photoelectric Effect - When light of sufficiently small wavelength is incident on a metal surface, electrons are ejected from the metal. This phenomenon is called as 'photoelectric effect' and the ejected electrons are called as 'photoelectrons..

When light of sufficiently small wavelength is incident on a metal surface, electrons are ejected from the metal. This phenomenon is called as 'photoelectric effect' and the ejected electrons are called as 'photoelectrons..

Thermoelectricity - Thermoelectricity refers to the phenomena that occur at the junctions of dissimilar conductors when a temperature difference exists between the junctions. The same phenomenon occurs within a single conductor too, with the two ends are maintained at different temperatures. In thi..

Gibberellins have been shown to be effective in breaking the dormancy in potato tubers and in tree buds in winter. Cytokinins have been found to be effective in breaking the dormancy of seeds. They also promote the germination of the seeds. The cytokinins substitute the red ligh..

A reversible reaction attains equilibrium when the opposing reactions occur at an equal rate. Therefore, if a reaction at equilibrium is subjected to some change it changes the rate of one reaction more than the other. By changing the concentration, temperature or pressure of any of the r..