In an experiment on photoelectric effect, the wavelength of the incident radiation is λ . The wavelength of the incident radiation is reduced to 3 1 rd of the initial value and the maximum kinetic e

Question

In an experiment on photoelectric effect, the wavelength of the incident radiation is λ . The wavelength of the incident radiation is reduced to 3 1 ​ rd of the initial value and the maximum kinetic energy of the photoelectron is observed to be n times the previous value. The threshold wavelength for the metal plate is :

TestHub · Accepted Answer

​ K = λ h c ​ − λ 0 ​ h c ​ ​ n K = λ 3 h c ​ − λ 0 ​ h c ​ ​ λ n − 3 ​ = λ 0 ​ n − 1 ​ ​ λ 0 ​ = n − 3 n − 1 ​ λ ​

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