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Double-slit experiment

Light can behave characteristics of both waves and particles. We developed a very easy-to-use setup to demonstrate the classical double-slit experiment sometimes referred to as Young's experiment or Young's slits.

In the experiment, a wave is split into two separate waves and later they are combined into a single wave. The path lengths of both waves are different and have a phase shift which creates an interference pattern. The Mach–Zehnder interferometer, is an another version which splits the beam with a mirror.

Devices' features:

  • Demonstrate interference

Parts

The Bill of Materials is always the most up-to-date version!

Modules for this setup

 Name Properties    Price Link   #
Baseplate puzzle - 5€ Base-plate 4
 Module: LED Holder + Single-Slit - 7,25€   LED Holder   1
 Module: Sample Holder To insert Double-Slits Slide. 2,5€   Double-slits   2
 Module: Raspberry Camera   - 33,70 €   RasPi Camera   1
 Module: Empty Cube   For stability of the setup, it is better to fill the empty positions under other cubes. 2,20 €   Cube   1

3D-printing

To acquire the STL-files use the UC2-Configurator. The files themselves are in the RAW folder. The module can be built using injection-moulded (IM) or 3D-printed (3DP) cubes.

Additional components

Preparing Single-slit and Double-slit

It's easy to prepare our Single-Slit and Double-Slit slides at home with basic equipments:

  • Aluminum foil
  • Sharp knife (Keep your fingers safe 🖐️ )
  • Four microscope slides (optional)
  • tape

Steps of preparing slides:

  1. Take a small piece of aluminum foil.
  2. Cut thin slit (or two slit next to each other) with your knife.
  3. Use this foil with your sample holder directly.
  4. (OPTIONAL) Insert aluminum foil piece between 2 microscope slides and tape two edges with tape.

And you have two new products and I called them as Single-Slit Slide and Double-Slit slide. Feel free to give a special name like Zombie 🧟 and genie 🧞

In the photo, there are three single-slits in the left slide and each single-slit has different width. In the right slide there are three double-slits pairs and each double-slits has different distance between each other.

ADDITIONAL INFO: Our slits are done with a laser cutting machine. It's also an option for people who have access to maker space or something like that. Because with a knife and by hand making slits of different width could be harder.

Let's put slides into the cube.

Preparing Single-slit and Double-slit

It's easy to prepare our Single-Slit and Double-Slit slides at home with basic equipments:

  • Aluminum foil
  • Sharp knife (Keep your fingers in safe 🖐️ )
  • 4 piece of microscope slides (optional)
  • tape

  1. Take a small piece of aluminum foil.
  2. Cut thin slit (or two slit next to each other) with your knife.
  3. Use this foil with your sample holder directly.
  4. (OPTIONAL) Insert aluminum foil piece between 2 microscope slides and tape two edges with tape.

And you have 2 new products and I called them as Single-Slit Slide and Double-Slit slide. Feel free to give a special name like Zombie 🧟 and genie 🧞

In the photo, there are 3 single-slits in the top line and 3 double-slit pairs in the bottom line. Each single-slit has different width and each double-slit has different distance between each other.

Let's put slides into the cube.

Assembly

For assembly instructions of the respective modules refer to the links in Modules for this setup.

Results

Will be updated soon!

Suggestions

If you have any problems or suggestions, please file an issue. Thank you!