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Dual Nature of Radiation question

2019 · 12 Jan · Shift 2 · Q57
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Dual Nature of Radiation question

2019 · 12 Jan · Shift 2 · Q57

JEE MainPhysicsDual Nature of RadiationMCQ+4 / −1
In a Frank-Hertz experiment, an electron of energy 5.6 eV passes through mercury vapour and emerges with an energy 0.7 eV. The minimum wavelength of photons emitted by mercury atoms is close to :
  1. A
    2020 nm
  2. B
    250 nm
  3. C
    1700 nm
  4. D
    220 nm
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