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

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
                  

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