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Radar

Radar➨

                In 1935,with hostilities looming in Europe,the British government asked Scottish physicist Robert Watson Watt to develop a personnel-destroying "death ray" that could harm the opposition. Watson Watt demonstrated that this was an impossible ambition. However, he theorized that a radio wave could be sent to bounce against a moving object and monitoring its travel could then provide information  about the target, such as its speed,direction of travel and altitude.

                 This could also determine the distance from the transmitter of fixed objects. A demonstration won favor with the government, and Watson-Watt subsequently gave the technology the name Radar(Radio detection and ranging).
         
Military Radar
   
                 By the beginning of  World War ||. Watson-Watt had installed a chain of Radar stations across the United Kingdom, and two other British physicist,Henry Boot and John T Randall, developed his concept of the resonant-cavity magnetron. This electron tube was capable of generating high frequency radio pulses with huge amount of power. This in turn led  to microwave radar, which is now used to measure atmospheric pollution and more importantly in modern forms of communications.




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