Experiment(s):
1. Determination of average wavelengths of LEDs
2. Determination of energy gap of semiconductor by optical method
3. Determinatiopn of coherence length of LED
Specifications:
a) 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
b) 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
