And what country can preserve its liberties if their rulers are not warned from time to time that their people preserve the spirit of resistance? Let them take arms. The remedy is to set them right as to facts, pardon and pacify them. What signify a few lives lost in a century or two? The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
The light show sparklies about the rotor is a good example of the Kopp–Etchells effect. Michael Yon, war correspondent named it to honor two soldiers. Do a search to learn more, it's a fascinating story.
Used to make maps and charts for DMA (later called NIMA, and now NGA). A lot of them were red light readable, then later on many also had to be blue-green light readable. Nice example of blue-green light.
Get in da choppa!
ReplyDeleteThe light show sparklies about the rotor is a good example of the Kopp–Etchells effect. Michael Yon, war correspondent named it to honor two soldiers. Do a search to learn more, it's a fascinating story.
ReplyDeleteMicheal Yon is a great writer and photographer.
DeleteUsed to make maps and charts for DMA (later called NIMA, and now NGA). A lot of them were red light readable, then later on many also had to be blue-green light readable. Nice example of blue-green light.
ReplyDelete