Diy Spectroscope

Introduction

Spectroscope. Spectrometer is the machine to give the readings.

Spectroscope can be made using

• Diffraction grating; eg. CD or DVD disk, or
  • Natural gratings: Striated muscle, peacock feathers, mother-of-pearl, and butterfly wings. Some invertebrate animals, like the peacock spiders, the antennae of seed shrimp, and Burgess Shale fossils
  • Iridescence in birds, fish and insects is often caused by thin-film interference
• Prism

Theory

Interference.

Spectral lines

See:

DIY

Below is collection of some tutorials.

DVD: Cut out a section of the DVD and then carefully peel it into two pieces. Use the clear piece.

Two different models:

1. Look-through
2. Use the reflection: Put the CD with the shiny side facing upward into the slit.

Both will have the slot where the light source enters the spectroscope. If this slit is too large, it can affect the clarity of the spectrum.

CD and DVD and a paper tube. Paint black.

• Remove the reflective layer form the cd using tape. Make sure the lines of the cd are parallel to de slit on top of the roll. Look thought the cd. https://www.instructables.com/DIY-Spectroscope/
• https://littlebinsforlittlehands.com/diy-spectroscope/
• The viewing hole doesn’t need to be too big as we want to avoid outside light from getting into this hole. https://www.moonbow.world/homemade-spectroscope/
• twist the slit around until the rainbow is as tall or large as you can make it. When it is as tall and large as possible, tape it in place. https://www.acs.org/education/celebrating-chemistry-editions/2024-ncw/diy-spectroscope.html

Diffraction grating

• Point the thin slit at a light source (light bulb, lamp, etc.) and look through the transparent diffraction grating. You will see light diffracted on the right and left sides. https://www.instructables.com/A-Simple-Spectroscope/

References

https://mpr-projects.com/index.php/2024/05/23/building-a-diy-spectroscope-video/

• Use "an analogue pocket spectroscope".