What will be potential difference between the cathode and the grid voltage at which there will be a marked drop in the anode current in the Frank-Hertz experiment, if the tube is filled with atomic hydrogen?

What will be potential difference between the cathode and the grid vol

1.	What will be potential difference between the cathode and the grid voltage at which there will be a marked drop in the anode current in the Frank-Hertz experiment, if the tube is filled with atomic hydrogen?
Answer» Solution :The first POTENTIAL jump TAKES place when the ELECTRON GOES over from the first to the second level: `Deltaepsi=hcR(1/1^(2)-1/2^(2))`

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What will be potential difference between the cathode and the grid voltage at which there will be a marked drop in the anode current in the Frank-Hertz experiment, if the tube is filled with atomic hydrogen?

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