Saturday, January 27, 2018

electromagnetic radiation - Absorption of light



I have two questions:





  1. When an atom absorbs part of spectrum from white light, why doesn't it radiate the photon back? What happens to the photon?




  2. How does the wave theory of light explain absorption of light?






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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

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