Chemistry: Periodic Table

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Periodic tableHistorical development of periodic tableClassification of the elements began with Lavoisier, whose classification was based on metals …

Physics: Optical Instruments And Applications

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Optical instruments: ApplicationsMicroscopes: one of the applications of light waves is seen in the operation of a simple …

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Electrochemical cellsThe set up in which chemical energy is converted to electrical energy is called an Electrochemical cell. …

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Propagation of sound waves(A) Source of sound waveSound is a form of wave motion which is conveyed through …

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Reflection of light waves(A)nature and sources of lightLight is a wave, it is a visible form of energy. …