Photo Cell Selenium Characteristics Apparatus to verify Inverse Squar Law

Photo Cell Selenium Characteristics Apparatus to verify Inverse Squar Law (EL 133)

Selenium Photo Cell mounted in metal box having window for injecting light, light source without bulb, Photo Cell with DC Microammeter (0-500uA) & DC Millivoltmeter (0-500 mV) & one plank with ½ meter scale.