Important Features of Mercury

Mercury is a little planet, with an orbital width around a third of our own, found give or take two and 75% light minutes from the Sun. It is approximately 1/twentieth the Earth’s mass and volume, with a surface temperature of -292 to 806 °f...
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Laser Devices Used For Communication

Due to the tremendous advantages and uses of laser devices, there are hundreds of institutes in advance countries, which are engaged in developing different types of laser. It is reliably estimated that new lasers are appearing at the rate of one per month. Days are...
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Salient Features of Fibre Optics

The salient features are as follows: (a)       Wide Band Width.   It can accommodate number of channels through one media. AT&T’s cable can handle 6000 simultaneous telephone calls, through a pair of cable. Latest WT-4 cable which is made by Bell Labs can handle 2,30,000 channels through a...
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Making Successful Communication

Communication means exchange of views. In order to establish Communication we need a transmitter, a receiver and a media. A low frequency signal may be audio, video or other type is modulated inside the transmitter and through a media directed towards the receiver where signal...
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Modulated Terms of Signal

Signal can be modulated in terms of: (a)       Amplitude Modulation (AM).       When the amplitude of high frequency carrier wave is changed in accordance with the intensity of signal, it is called amplitude modulation. In amplitude modulation only the amplitude of the carrier wave is changed in...
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Introduction To Radar

Radar is basically a means of gathering information about distant object or targets by streaming electromagnetic waves at them and analyzing their echoes (reflection). It was evolved during the years just before World War II independently and more or less simultaneously in Great Britain, the...
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Principle of Electro Magnetism

Electro Magnetism. When a magnetic material like an iron bar placed inside a long coil of insulated wire carrying a strong current, the iron bar will behave like a magnet. The magnet made by this (electric) method is known as electromagnet and this phenomenon is known...
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