Michelson interferometer is a common two beam interface optical interferometer. The incident beam is split into two equal intensity beams by using beam splitter. One beam is moves towards Mirror M1 and other towards M2; after reflection from both mirrors beams superimpose at beam splitter and interference pattern can be observed on screen.
In this model of Michelson interferometer, sodium vapor lamp is used as light source. Sodium has two emission wavelengths that have extremely close values and without sensitive equipment, it cannot be distinguished. Measurement of these lines, designated as D1 and D2 Fraunhofer lines, the average wavelength as well as difference between the two emission lines of sodium can be determined. The purpose of this experiment is to measure the wavelength of Sodium D emission lines.
- To find out the difference in wavelength of D1 and D2 lines of sodium light.
- To determine wavelength of light source.
- To find refractive index of a transparent plate.
- To study refractive index change in air under different pressures and determination of refractive index of air.
- Precision kinematic mounts for optical components
- Optics used for design have very good surface quality
- Assembly of setup is very easy
- CCD/CMOS camera is used
- Computer interface
|Experimental set up Contain||Quantity|
|Optical Breadboard (450 X 600 mm)
Kinematic laser mount
Mirror mount with translation
Mirror mount with precision translation
Rotation stage( Resolution 10/division)
Screen with mount (Dimension 75x75mm)
Pressure cell (Pressure Range 0-300 mm Hg)
Mirror with cell
Diode laser < 5mW (650nm or 532nm)
Diode laser power supply
Sodium vapor lamp
Sodium vapor lamp power supply
Collimator with Diffuser disc with mount
Camera lens assembly (Focal length 50mm)
Sodium lamp mount
Rotational stage mount
Note: – Laptop is not included in this set up.