1. Making a spectroscope? Oleg Gontar

2. Do You Recall The Properties of Light? What is absorbance? What is transmittance?

3. Absorbance vs Transmittance

4. What is a spectroscope? A spectroscope is a device that lets us find out what things are made of. It works by taking light and splitting it up into its component colors. The spectroscope spreads out the colors of the light, and we can identify the elements by the bright lines we see in the spectroscope.

5. What does a spectroscope look like?

6. What is a cuvette?

7. How much [cholesterol] do I have?

8. Homemade Spectroscope

9. How do we make homemade Spectroscope?

10. Three main parts of our spectroscope Slit Diffraction grating Viewing port

11. What is the most important task? The most important task is to make sure that slit, viewing port, and diffraction gradient are lined up properly!

12. This mark shows us where the paper tube will go

13. Place the paper tube on the box, centered over the circle we just drew

14. Move the paper tube over a little bit and trace another circle around the paper tube

15. These circles will tell us where to cut the box.

16. Cut an oval out of the box with a sharp knife

17. Making a slit

18. Making the light path The slit will be on the far left of the box. Cut a small rectangle out of the box at the height marked by the small circle we made with the CD disk. The rectangle should be about a half inch wide, and two inches high. Carefully unwrap the two razor blades, and set them over the rectangular hole.

19. Razor positions

20. Tape the CD disk onto the back wall of the box Slit CD

21. Seal up any places on the box where light might leak in Tape

22. Use the aluminum and tape to attach the paper tube Tube Angle

23. To make sure the angle is correct, hold the slit up to a light, and look through the paper tube, adjusting it until you can see the full spectrum from red to purple.

24. Reference http://sci- toys.com/scitoys/scitoys/light/cd_spectrosc ope/spectroscope.html