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Which constituent radiation of the electromagnetic spectrum is used (i) in radar (ii) to photograph internal part of a human body, and (iii) for taking photographs of the sky during night and foggy conditions? Give one reason for your answer in each case. |
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Answer» Solution :(i) Microwaves are used in the operation of RADAR because microwaves have small wavelengths and are not DIFFERENT or bent by objects of normal diemension comming in its PATH. Due to it, these waves can be SENT in a particular direction as a beam singnal. (II) x-rays are used to photograph internal parts of a human body because x-rays are quite short wavelength. They can easily pass through flash (iii) Infrared rays are used for taking photographs of the sky during night and foggy conditions because these radiations are radialy absorbed by water molecules present in foggy conditions. After absorption of heat, these foggy particles are heater up and there by surrounding is heated. Due to, it the infrared rays can locate the object present there. |
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