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The maximum wavelength of radiation that can produce photoelectric effect in certain metal is 200 nm. What is the maximum kinetic energy (in electron-volt) acquired by the electron due to radiation of wavelength 100 nm?

Correct answer

6.2

Step-by-step solution

Here, λ 0 = 200 n m ; λ = 100 n m ; maximum KE = h c λ e - h c λ 0 e = h c e 1 λ - 1 λ 0 = 1240 1 100 - 1 200 = 6.2 e V

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