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OPTION (A) The movement of a radio signal through the air is observed with the help of a Scientific instrument.
Radio signal are Radio waves which are a type of electromagnetic radiation with the longest wavelengths in the electromagnetic spectrum, typically with frequencies of 300 gigahertz and below.
At 300 GHz, the corresponding wavelength is 1 mm; at 30 Hz the corresponding wavelength is 10,000 km. Radio signals are used for a huge variety of tasks.
Radio signals are used to carry radio broadcasts, they are used to send signals to astronauts, establish wi-fi connections, for cellular communications and many, many more applications.
Radio signals are essential to enable today's technology to function.
A scientific instrument is a device or tool used for scientific purposes, including the study of both natural phenomena and theoretical
research.
In the Digital era Instruments are increasingly based upon integration with computers to improve and simplify control; enhance and extend instrumental functions, conditions, and parameter adjustments; and streamline data sampling, collection, resolution, analysis (both during and post-process), and storage and retrieval.
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