- Joined
- Feb 8, 2014
- Messages
- 490
Take a dial, vernier, or electronic caliper and open it to .002". Hold it up so you are looking through the gap at fluorescent lights. Now tilt the calipers gradually to narrow the effective gap, little by little. At some point you will see green light with diffraction patterns in it. Try it, it's pretty cool!
unless your COLOR BLIND AS I AM