a mixture of three wavelength lambda 1 lambda 2 and lambda 3 , (lambda1>lambda2>lambda3) is made to incident on metal surface of threshold wavelength lambda 2 . it the number of photons of each wavelength is 10^6 and eficiancy of photo electric effect is 1%, calculate the number of photo emitted
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the wavelength of the lambda it's will the increase in their the time
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