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Photocells and their Application
A photocell converts the change in the intensity of light into a change in the electric current. The diagram shows a photocell circuit. The cathode is made of photosensitive materia..
Applications of Photoelectric Cells
Photocells are used in television camera to reproduce sound recorded on films, in counting devices, in burglar and fire alarms, to measure the temperature of stars, to study the spectrum of heavy bodies, to operate street light, to compare the illuminating powers of two sources, in ..
Colorimetry
It is a technique used for measuring the density of a coloured substance in a solution. The instrument used is called colorimeter. Here, monochromatic filters are used and light rays of specific bands of wavelength are passed through the solution. Any compound present in the solution, reduces the i..
It is a technique used for measuring the density of a coloured substance in a solution. The instrument used is called colorimeter. Here, monochromatic filters are used and light rays of specific bands of wavelength are passed through the solution. Any compound present in the solution, reduces the i..Matter Waves
>This is called as dual nature of mater. The radiation has a dual aspect behaving either as waves or as particles (waves when it interferes, diffracts and particles in a photocell). Einstein showed that a particle having a finite mass has been supposed to be associated with a definite amo..
Dual Nature of Radiation and Matter Summary
Summary - The phenomenon of interference, diffraction and polarization can be explained by the wave theory of light. But the photo electric effect can be explained only using 'photon theory'. That is using particle nature of light. The experimental study of photoelectric effect led to the concepts ..
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