Marvel: Avengers Alliance on Facebook
Build a high resolution spectrograph in 15 minutes A high resolution spectrograph Building a home-brew recording spectrograph used to mean dealing with microcontrollers and stepper motors moving diffraction gratings past a light sensor, and although many were planned, few were actually built. Modern digital cameras and the Internet have combined to make building a laboratory quality high resolution spectrograph a task that can be done in fifteen minutes at your kitchen table, with a few plumbing parts. ...and a digital camera and Internet access, but you probably have access to both of those already. For the spectrograph you will need: Chapter 7: Light and Optics -- Build a lab quality spectrograph in 15 minutes for less than $20.
UK Pink Book Data, Yearly United Kingdom National Statistics