Circular hole diffraction

a) Laser

Type: Semiconductor diode Laser
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
Mains cord: 2 pin

b) Light detecting microscope

Bed travel: 100 mm (One Axis)
Resolution: 0.001 mm
Output: Displayed on metre in mm
Sensor: Photo detector
Base: Cast Iron

c) Circular hole slit
Mount: Suitable to be fitted on Laser
Hole dia: 1 to 2 mm