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A plane electromagnetic wave travels in vacuum along sz - direction. What can you say about the direction of its electric and magnetic field vectors? If the frequency of the wave is 30 MHz, what is its waelength? |
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Answer» Solution :As electromagnetic waves are transverse in nature, electromagnetic oscillations MUST be in X-y plane in a direction perpendicular to the direction of propagation of WAVE. In fact, vibrations of electric vector `vecE` take place along x - direction and that of magnetic vector `vecB` along y - direction. Here, frequency `v=30 MHz=30xx10^(6)Hz` `therefore"Wavelength "LAMBDA=(C)/(v)=(3xx10^(8))/(30xx10^(6))=10m.` |
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