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NEET-XII-Physics

11: Dual Nature Of Radiation And Matter

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  • #6
    In an experiment on photoelectric effect, the slope of the cut-off voltage versus frequency of incident light is found to be 4.12 × 10-15 V s. Calculate the value of Planck’s constant.
    Ans : The slope of the cut-off voltage (V) versus frequency (ν) of an incident light is given as:



    Where,

    e = Charge on an electron = 1.6 × 10-19 C

    h = Planck’s constant



    Therefore, the value of Planck’s constant is