You must log in or # to comment.
Ineffably magnificent…
The following lamp looks like creating a whole… Universe…:
- https://en.wikipedia.org/wiki/File:Xenon_Flash_Wiki.ogv (High-speed, slow-motion video of a xenon flashtube recorded at a speed of 44,025 frames per second…)TIL about the .ogg video format. And mpv for Android is great.
I learned about the arc lamp when I was a kid, watching Connections on PBS. John Burke explains it in one episode, and it appears during the title sequence of every episode. IIRC, it was invented to replace theater stage lights, where previously were lit by oil lamps, that had a tendency to start the set on fire.
Here it is : https://archive.org/details/ConnectionsByJamesBurke/Connections/Season+3/Connections+S03E03+-+Drop+the+Apple.mp4
It is really sad what is happening PBS kids after Trump cut all of their funding.
Making the masses dumber so they continue to vote for things not in their best interests is part of Trump’s platform.
They made fun of airing sesame street in middle eastern countries, but if you think about it…really think about it l…Sesame Street is like some of the best western propaganda out there, and was being placed in front of young children and their mothers (who themselves were likely obedient/subservient to their husbands).
Like, really, there’s no better counterterrorism than wholesome propaganda for kids.
I worked with one in the 80s to do large-format B&W jewelry photography. After a few hours of work, I had a sunburn on one side of my face.
They emmit large parts of the smaller EM spectrum. So, yes.
Fun fact- The xenon bulbs used in continuous lighting such as projectors and followspots are pressurized at several atmospheres. Common safety measures when changing those bulbs out involve a kevlar suit and face shield reminiscent of a bomb squad suit.
Yup, and the sheer size of a projector is because 90% is shielding in case of a lamp explosion. The actual functional circuitry is about the size of a pi.
The lamps also come in cages.
Yea they only seem practical for very specific uses now that we have LEDs.
I learned about these from the projectionist where I worked, back when I was a kid. When they’d get taken out of a projector and thrown in the garbage, he’d smash them on the ground to get the tungsten electrodes out. Apparently they both looked cool, like the surface of the moon, and sold for a lot!
These things have very high CRI, 98 to 100, and are conveniently 6000k. They were used in movie theatres!
Also in stage spotlights. Old follow spots used these, because the huge output made them fantastic for throwing a beam long distances. And the good CRI made performers look really good, and meant it could be colored (like with lighting gels) very well.
deleted by creator
