Student Manual

Franck-Hertz experiment is a profound way of looking at the quantization of energy levels in an atom. A triode tube filled with mercury vapors is employed to accelerate electrons that in turn excite mercury atoms and energy transfer can be observed only for certain discrete values of energy of the colliding electrons. This implies that energy transfer to and from an atom can only be in fixed amounts, and hence a discrete atomic structure.

Sample Results Franck Hertz Plots at different temperatures
Experiment Code 1.13
Version 15 May 2015, 2015-v1

Further Readings and References


Pictorial Procedure

1. Connecting control unit to the tube.

1. Connecting control unit to the tube.

2. Connecting control unit to the tube.

2. Connecting control unit to the tube.

3. Connecting the outputs to the scope.

3. Connecting the outputs to the scope.

4. Temperature measurement.

4. Temperature measurement.

Observations in Comsoft.

Observations in Comsoft.