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Question
what is wave picture of light? how this picture failed to explain the photoelectric laws?
Class-12th.

Answer
Scientists finally realized that electromagnetic radiation can have both wave and particle characteristics.  EM exists in little packets of energy called quanta.  The energy = hf where f is the frequency and h is a constant.  If the energy is high enough it can cause electrons to be ejected from the surface of a material.  When we talk about light, we usually mean visible light which is a very small portion of the EM spectrum.  

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Richard J. Raridon

Expertise

I can answer most questions in undergraduate physics courses, including electricity and magnetism, atomic and nuclear, mechanics and optics.

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I have taught undergraduate physics courses

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Sigma Xi, AAAS, SE section of APS

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BA in math, MA in physics, PhD in physical chemistry

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Fellow of AAAS

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