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Dual Nature of Radiation question

2019 · 9 Jan · Shift 1 · Q63
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Dual Nature of Radiation question

2019 · 9 Jan · Shift 1 · Q63

JEE MainPhysicsDual Nature of RadiationMCQ+4 / −1
Surface of certain metal is first illuminated with light of wavelength λ\lambdaλ 1 = 350 nm and then, by light of wavelength λ\lambdaλ 2 = 540 nm. It is found that the maximum speed of the photo electrons in the two cases differ by a factor of 2. The work function of the metal (in eV) is close to : (Energy of photon n = 1240λ(in mm){{1240} \over {\lambda (in\,mm)}}λ(inmm)1240​ eV)
  1. A
    1.8
  2. B
    2.5
  3. C
    5.6
  4. D
    1.4
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