Franck Hertz apparatus in Pakistan

In 1914 Franck & Hertz experimentally proved that theenergy transferred from electrons to atoms always hasdiscreet values and the values obtained for energy levelsare in agreement with spectroscopic results. Thusexperimentally proving the Bhor’s Model. It is a landmarkexperiment and can e performed in any college lab.The experiment consists fo the following :-• Argon filled tetrode• Filament Power Supply 3.6-4.3 continuously variable• Power Supply for V G K 1 1.3-5V continuously variable• Power Supply for V G A 2 1.3-15V continuously variable• Power Supply for V G K 2 0-95V continuously variable• Saw tooth waveform for CRO displayScanning Voltage :0-80VScanning Frequency : 115+20 Hz• Multirange Digital AmmeterDisplay : 3½ digit, LEDRange : 10-7, 10-8 & 10-9AThe instrument can not only lead to a plot of the amplitudespectrum curve by means of point by point measurement,but also directly display the amplitude spectrum curve onthe oscilloscope screen. This instrument can thus be used asclassroom experiment as well as for demonstration to agroup of students.