MS-667 PVG PLANK’S CONSTANT APPARATUS

To plot Forward & Reverse Characteristics of a Vacuum Photo cell &
to calculate its stopping Potential.
Dual range Power Supply 0-1VDC/ 0-50 VDC with one dual range
voltmeter & one sensitive micrometer of 100uA. Photo cell
mounted in wooden box having window for injecting light,
variable intensity light source & three colored filters.