Physics, 18.12.2019 06:31, timiaparker

When the tube is filled with mercury vapor, as in this case, a sharp drop in the collected current is observed when the accelerating potential reaches 4.9 . the current drops suddenly to a negligible value and slowly increases again when the accelerating potential is above 4.9 . what is the energy absorbed by the atomic electrons in the mercury atom when the accelerating potential is 4.9 ?
b) the excited mercury atoms decay back to the lowest energy level by emitting radiation. what is the wavelength of this radiation?

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When the tube is filled with mercury vapor, as in this case, a sharp drop in the collected current i...