InterviewSolution
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InterviewSolution
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How are electromagnetic waves produces by osillating charges ? Why is it not possible to produce e.m. waves in the visible region with modern electronic circuit in the laboratory? What is the method of production of x-rays? |
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Answer» Solution :When a charge q is oscillating with a FREQUENCY v, it produces an oscillating electric field, which in turn produces oscillating magnetic field. This oscillating magnetic field produces oscillating electric field and so on. This simultaneous oscillating electric magnetic fields produces electromagnetic wave of frequency v. In fact electromagnetic waves are those waves in which there sinusoidal VARIATION of electric and magnetic field vectors at right angles to each other as well as at right angles to the direction of propagationof wave. In order to produce e.m. wave in the visible region say yellow light of frequency`6xx10^-14Hz`. For this we have to set up an oscillatorycircuit of frequency `6xx10^14Hz`. The MODERN electronic circuit with LATEST techniques can hardly produce oscillates of frequency `10^11Hz.` That is why e.m. wave in the visible region cannot be produced with modern electronic circuits. X-rays are produced, when fastly moving electrons are suddenly STOPPED by the metal target of high atomic number. |
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