Question 202: Dual Nature of Matter and Radiation

Question

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 :

Accepted Answer

The minimum wavelength of emitted photons is
$$\lambda $$ = $${{1240} \over {5.6 - 0.7}}nm$$ = 250 nm

Answer

2020 nm

Answer

250 nm

Answer

1700 nm

Answer

220 nm

Dual Nature of Matter and Radiation

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 :

Choose the correct answer: