Dec 5, 2015 at 17:27. Add a comment. 1. The orange light is very likely sodium D lines. Sodium is present in glass, and emits light when excited. Electrons are easily promoted from the 3s to 3p orbitals. When they decay back to 3s, they emit light at 390.0 and 390.6 nm. The reason for two lines is spin-orbit coupling. Aug 5, 2014. #6. Hey Nick, The light visible to humans goes right through glass, that's why we. see it as clear. The light plants need to grow also goes through glass, but if. you want to put the plants into natural sunlight after growing them under glass they will get burned by the UV from the sun, you have to break them in slowly for natural
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However, what Plexiglas does regarding ultraviolet light is reduce its intensity. As ultraviolet rays pass through Plexiglas windows, they're refracted and broken up, made less intense so that those on the other side of the window aren't exposed to the full level of the radiation. Bubbling, Peeling and Cracking Acrylic Aquariums Become Yellow and Brittle Over Time. Another inherent flaw of acrylic is it can’t stand up to UV light, turning yellow over time. Many plastic materials claim to be “UV Resistant”, but no acrylic is UV-proof. In the long run, no additive can make plastic/acrylic stand up to UV light as long as glass.
Check a fabric’s sun safety by holding it up to the light. If you can see through, UV radiation can easily penetrate the fabric and reach your skin. Tight clothing can stretch and reduce the level of protection offered, as the fibers pull away from each other and allow more UV light to pass through. How does UV light effect microorganisms?
The plasma frequencies of many metals and semiconductors are in the UV range I think. At frequencies higher than the plasma frequency, light won't reflect off the free electrons and may in fact be transmitted. So the frequency of the light matters and so does the material in question. aardvarkmadman's idea is really good though. Plexiglass is a type of acrylic sheet that refers to different glass-like products manufactured under different names. In earlier years, manufacturers produced acrylic sheets under the name plexiglass. Currently, manufacturers create plexiglass acrylic products but term them under names such as acrylate, crylux, lucite, and perspex.
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If you want to take a white LED and get UV light, you just need to block the visible colors while leaving the UV light to pass through. try shining the green laser on orange plastic stuff
UV radiation kills bacteria, viruses, and other disease-causing organisms to make the water fit for consumption. How does UV purification work? UV purification requires water to pass through ultraviolet radiation that immobilizes and kills harmful microorganisms. Thus, it purifies the water and makes it hygienically safe for consumption.
High-tech fabrics treated with chemical UV absorbers or dyes prevent some penetration from UV rays. Fit: Loose-fitting apparel is preferable. Tight clothing can stretch and reduce the level of protection offered, as the fibers pull away from each other and allow more UV light to pass through.
Our PCO system does not have a chamber so we create the field inside the entire duct with our 18” lamps and create a massive UV bath of 72” x duct cross-section area. So, you have confirmed exactly what this thread is about - UV lights will destroy any materials made of hydrocarbons exposed to the UV lights.
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