The wave nature of X-rays was established by X-ray diffraction experiments. In the same way the Davisson and Germer experiment […]
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Thermionic emission, also known as thermal electron emission, is the process by which charge carriers, such as electrons or ions, […]
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Cathode rays
When the pressure in the discharge tube is less than 10-4 mm of Hg, the discharge tube starts showing fluorescence. When […]
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Conduction of electricity in gases
Electrons: When a high tension discharge passes between electrodes sealed into a partially evacuated vessel, the gas becomes luminous showing a series […]
Embedded in an atom which consists of a nucleus that is positively charged and which revolves round the orbit is […]
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Franck-Hertz Experiment
The discreteness of atomic energy levels was first shown directly in the Franck-Hertz experiment. This experiment is one of the […]
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Energy levels in an atom
In Figure 25.1, we’ve drawn a few of the energy levels of a hypothetical atom. Let’s start by looking at […]
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Quantum theory
Some of the important postulates of the Bohr’s model of the atom were that the electrons moved around the nucleus […]
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Photoelectric Effect Applications
Below are the applications of Photoelectric effect: The photoelectric effect is used in the photoelectric cell which converts a light […]
INTRODUCTION In 1887, photoelectric effect was invented by the scientist H. Hertz. When we passing a light into a material, the material […]