JEE Main 12 Jan 2019 Shift 2 Solved Paper

Section: Physics

Question : 30 of 90

Marks: +1, -0

In a Frank-Hertz experiment, an electron of energy5.6 eV passes through mercury vapour andemerges with an energy 0.7 eV. The minimumwavelength of photons emitted by mercury atomsis close to :-

[12 Jan 2019 Shift 2]

2020 nm
220 nm
250 nm
1700 nm

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