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Microwave Propagation and Remote Sensing by Pranab Kumar Karmakar

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1

Outlines of Radio Waves and Troposphere

1.1 General Perspective

Thermal radiation is the process of transmission of energy from a source either by motion of material particles or by waves as in sound, light, and x-rays. Here, the rays are the curved lines along which the energy is sent from the source. One can experience radiation in daily life; when he holds his hand in front of a hot object and radiant heat is felt. We can feel radiant heat as we stay out in the sun. Moreover we need light to see the surroundings. All these are the examples of electromagnetic radiation. According to the wavelength or frequency, this radiation is grouped or classified and named as x-rays, ultraviolet rays, solar rays, infrared, and radio waves. But, ...

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