3 ms·
You can also buy diffraction glasses for under $10. They're marketed as "rave" accessories, but I found them useful for quickly identifying incandescent light
by p1mrx 11y ago
You can also buy diffraction glasses for under $10. They're marketed as "rave" accessories, but I found them useful for quickly identifying incandescent light bulbs hidden inside fixtures, in order to replace them with CFLs.
- IIAOPSW 11y agoOr just get diffraction gratings. No need for the silly "glasses" markup, you know the number of lines per millimeter, and you can get 25 of them for around the same $10 http://www.amazon.com/gp/offer-listing/B00K6K3MCW/ref=sr_1_1_olp?ie=UTF8&qid=1443337421&sr=8-1&keywords=diffraction+grating&condition=new http://www.amazon.com/gp/offer-listing/B00K6K3MCW/ref=sr_1_1...