Related Posts. How to make an electric motor. How to make solar car. Now you can see the world in a whole different way. In this project I'm gonna show you how to make your own spectroscope, for under 5 bucks. Here is what you need: a carton or pvc tube, I'm using a toilet paper tube myself. Remove the reflective layer form the cd using tape, and cut the circle.
Sometimes is necessary to make a little scratch on the CD before use the tape. Place the two index cards over one side of the tube, creating a vertical slit and use hot glue to stick it in place. Paste the circle at the other side of the tube, and make sure the lines of the cd are parallel to de slit between the cards. Building your own spectroscope using everyday items takes just under an hour. Light will enter your spectroscope through a small slit the diffraction grating , reflect off the CD, and be seen through the viewing tube.
The CD will help to ensure that the three elements line up correctly. Step 1: Begin by making a hole for the viewing tube. Set the CD on top of the box, about a half an inch from the left edge on the side you intend to place the tube.
Use a pen to trace the circle in the middle of the CD. Step 2: Center the tube over the circle and trace it. Move the tube over about half an inch and trace another circle.
There are nice spectroscope stands some with built-in illumination on the market, but gaining some experience eliminates the need for them. For the new user, it is recommended to start with a gemstone that produces a clear absorption spectrum, such as synthetic ruby.
Next: Refractometer Return to the Table of Contents. Jump to: navigation , search. OPL teaching diffraction grating spectroscope on stand left and prism spectroscope with adjustable slit right. Absorption of all wavelengths except red. Absorption of all wavelengths except red and blue. Our eyes see lights but can't really tell what kind of light it is. For example, in the picture, we aren't sure which rooms are lit by fluorescent lights or incandescent lights light bulbs.
With a spectroscope we could. The colors will look smeared together rather than banded. You may get a better spectrum by letting the light bounce off a white piece of paper. When viewing a light directly, the brightness is somewhat uneven.
Sunlight is in the same category as an incandescent bulb. The hot gases in the sun produce a continuous spectrum of light as seen in this rainbow. Here is what the spectroscope sees with white objects lit by sunlight. Note: This is not aimed at the sun which is not safe , but aimed at something white that is in the sunshine or even in the shade. You see a continuous shade from red to purple.
It's basically the same as a rainbow. Fluorescent lights however, produce light a whole different way. In the below diagram we see mercury atoms. At high voltage the outer electrons of mercury are stripped off.
The will fall back into a neighboring mercury atom. As they do, they give off a photon of ultraviolet light which we can't see. However, this UV photon strikes the inside of the fluorescent bulb which is coated with various phosphors.
A phosphor is a mineral that absorbs UV light and converts it to visible light. Zinc sulfide ZnS doped with silver and aluminum emits blue light. Many phosphors use exotic metals to create different colors. The phosphors do not make a continuous range of colors but emit colors at a few different regions of the spectrum.
Learn More. What is this? We want this item to be alive when you get it! Therefore, we need to know when you'll be home to receive it minimizing the package's exposure to the elements.DIY Spectroscope: A spectroscope is an instrument used to break light up into its constituent colors, just like a prism does, showing the light spectrum. Save money with this DIY physics project, by making authentic scientific tools with recycled materials.