Electromagnetic radiation is regarded as the transmission of the radiant energy. The common observable forms of radiant energy are light and heat. According to Quantum mechanics, electromagnetic radiation has a dual nature. It possesses some properties of waves and some properties which are characteristic of particle-like discrete packets of energy called quanta or photons. A wave is defined by its wavelength (X) or by its frequency (v)
Chapter 11 “ Alkohols,Phenols and Ethers” Past Papers Short Questions Solved of Bahawalpur Board,DG Khan ...
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