10881 - ESAW Planck's Constant Apparatus
The Apparatus consist of the following : 1. Photo Sensitive Device : Vacuum photo tube. 2. Light source : Halogen tungsten lamp 12V/35W 3. Colour Filters : 635mm. 570nm, 540nm, 500nm & 460nm. 4. Accelerating Voltage : Regulated Voltage Power Supply. Output : +15V continuously variable through multi-turn pot Display : 3%digit 7-segment LED Accuracy 2+0.2% 5. Current Detecting Unit : Digital Nancammeter It is high stability low current measuring instrument Range :1000mA, 100 A, 10 A&1 A with 100% overranging facility
Resolution : 1AatimArange Display : 3%4digit 7-segment LED Accuracy :+00.2%
6. Power Requirement : 220V + 10%, 50Hz or 110V + 10%, 60Hz as required. 7. Optical Bench : The light source can be moved along it to adjust distance between the light source and the photo tube, scale length is 400mm. A tube is provided to install colour filter and a focus lens is fixed in the back end. The set-up is complete in all respect, no additional accessory required.
