Energetic free electrons can transfer their energy to bound, Ask an Expert

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Energetic free electrons can transfer their energy to bound electrons in atoms. In 1913, James Franck and Gustav Hertz passed electrons through mercury vapor at low pressure to determine the minimum kinetic energy required to produce the excited state that emits ultraviolet light at 253.7 nm.

What is the minimum kinetic energy (in J)?

What wavelength (in m) is associated with electrons of this energy?

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