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When electromagnetic radiaiton of wavele...

When electromagnetic radiaiton of wavelength `300 nm` falls on the surface of sodium electrons are emitted with a kinetic enegry of `1.68xx10^(5)Jmol^(-)`. What is the minimum enegry needed to remove an electorn from sodium?
Strategy: The minimum enegry required to remove an electron from target metal is called work function `W_(0)` of the metal. It can be calculated from Eq., provided we know the energy of the incident photon and kinetic enegry of a single photoelectorn.

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