Planck's Constant Experiment

Planck's Constant Experiment

Introduction

Planck's Constant is used to demonstrate photoelectric effect and calculate Plancks constant according to Einsteins equation of photoelectric effect. It is a cost-effective teaching apparatus for physics laboratories at colleges and universities. 

Specification of  Planck's Constant Experiment

• Cut-off wavelengths of color filters: Red-635 nm,Orange-570 nm, yellow-540 nm, Green-500 nm, Blue 460 nm.
• Light source: 12 V/35 W Halogen Tungsten lamp.
• Sensor: vacuum photo tube.
• Dark-current: less than 0.003 A.
• Precision of accelerating voltage: less than 2%.
• Measurement error: approximately 10% as compared with literature value. 

Features:

• Inbuilt power supply & photocell.
• Different types of filters and LED.
• Different types of wave length of all filters and LED.