In a historical experiment to determine Planck’s constant

In a historical experiment to determine Planck’s constant, a metal surface was irradiated with light of different The emitted photoelectron energies were measured by applying a stopping potential. The relevant data for the wavelength (l) of incident light and the corresponding stopping potential (V0) are given below:
2  Given that c = 3 × 108 ms–1 and e = 1.6 × 10–19C, Planck’s constant (in units of J s) found from such an experiment is :

(A) 6.0 × 10^–34
(B) 6.4 × 10^–34
(C) 6.6 × 10^–34
(D) 6.8 × 10^–34

Anurag Mishra Professor Asked on 23rd May 2016 in Physics.
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    Answer: (B) 6.4 × 10^–34

    Anurag Mishra Professor Answered on 24th May 2016.
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