Experiment(s):
1. Determination of average wavelength of Sodium
D1 and D2 lines
2. Determination of D1-D2 separation & thickness of Mica
3. Determination of average wavelength of semiconductor
diode Laser<
Specifications:
a) Interferometer
Adjustable beam splitter twin
parallel arrangement
Mirror: 2 Axis adjustment
LC: 0.001 mm
Measurement: 3 scale method
Mirror coating: Silver finished
b) Laser & power supply
Type: Semiconductor diode
Laser with beam diffuser
Wavelength: 625 nm (Red)
Output power: 3 mW
Mount: Cast iron base with levelling screw
Power supply:
Output: Suitable for 3 mW &
5 mW semiconductor Lasers
Rated Input: 220 V/50 Hz
or 110 V/60 Hz
c) Digital fringe counter
Calibration for dark and bright
spots: Manual
Suitable for rings >10 mm dia
Display: LCD readout
Rated Input: 220 V/50 Hz
or 110 V/60 Hz
d) Sodium vapour lamp set
(Optional)
Lamp: Philips / Thorne 35 W
Lamp House: Single lamp type
with fixed slit openings
Transformer: 35 W, instant ON
Rated Input: 220 V/50 Hz
or 110 V/60 Hz
