The Michelson interferometer is one of the best-known interferometers and is comparatively easy to set up and adjust. It can be used in lessons, for example in the context of interference of light or the theory of relativity (keyword: light ether experiment), to clearly convey basic physical principles.
On this page you will find all information about the structure, special features and measurement possibilities of the modular Michelson interferometer as well as working materials for use in the classroom.
Structure
Schematic Structure
Required modules:
- Laser diode (USB) or Laserdiode
- Battery box
- Lens module
- Beamsplitter
- 2x Mirror (90°)
- Screen
- Base Plate (min. 4×4)
- (possible pinhole)
Here you will find the complete component and order list.
Special Features
Different lenses:
There are different lenses in the parts list. A brief explanation of their properties:
- Acrylic glass lens with 15mm focal length: This lens has a short focal length and is particularly suitable for creating an interference pattern with high contrast and sufficient size. However, the surface quality of the lens is comparatively low, which can result in impurities in the interference pattern.
- Achromat with 26.5mm focal length: The longer focal length results in a slightly smaller interference pattern with fewer rings. However, this lens has a higher surface quality, which means that the interference pattern contains fewer impurities and appears more precise overall.
The choice of lens therefore depends on the desired properties of the interference pattern.
TO THE INTERFERENCE PATTERN:
The Michelson interferometer can produce different interference patterns.