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     EduGorilla 
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    Light of wavelength 0.6 mm from a sodium lamp falls on a photocell and causes the emission of photoelectrons for which the stopping potential is 0.5 V. With light of wavelength 0.4 mm from a sodium lamp, the stopping potential is 1.5 V. With this data, the value of h/e is

    Options :-

    1. 4 × 10-19 V-s
    2. 4 × 10-17 V-s
    3. 4 × 10-15 V-s
    4. 4 × 10-13 V-s
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