Reference: Lab Experiments Journal vol-2, No.2, Page-10 Lab Experiments Journal vol-10, No.3, Page-215
Semi-conductor energy gap by optical method
Model: CLED-201
Experiment(s):
Determination of average wavelengths of LEDs
Determination of energy gap of semiconductor by optical method
Determinatiopn of coherence length of LED
Specifications
1. Microscope
Newton’s rings microscope Reflector: 45° turning glass plate Metal assembly with knob screw Fixed glass plates and lens assembly Base material: Cast iron Moving components: Brass Reading: Screw gauge type reading micrometer
2. LED light source
Lamp: 2 W LED Wavelength: 590 nm Height: Adjustable up to 150 mm Power supply: Fixed voltage LED driver Rated Input: 220 V/50 Hz or 110 V/60 Hz Mains cord: 2 pin