Fluorite typically glows a blue-violet color under shortwave and longwave light. Some specimens are known to glow a cream or white color. Many specimens do not fluoresce. Fluorescence in fluorite is thought to be caused by the presence of yttrium, europium, samarium [2] or organic material as activators.
Strong, durable and highly versatile, acrylic sheets are now the preferred material in a huge range of applications. One of the huge advantages of clear acrylic is the fantastic levels of optical clarity. Compared to glass, which delivers below 90%, acrylic allows up to 92% of visible light that it comes in contact with to pass through.
light that passes through the sheet will increase with the sheet thickness. For instance, when light passes through a 1/4” thick sheet it will pass through twice as much pigment as when it passes through an 1/8” thick sheet. Therefore, the 1/4” thick sheet transmits less light than the 1/8” inch thick sheet.
If you click on my signature banner, you can go download the free PDF version of my book, which includes a chapter on lighting for turtles, and an appendix on UV-B. But to answer your question succinctly, no, UV-B doesn't penetrate most acrylic sheets well, and plexiglass is a form of acrylic. There are special forms of acrylic available that
A photon that's 10.2 eV has a wavelength of $1.21\times10^{-7} m$, which is UV light. Less energetic light (e.g. blue-to-red) just doesn't have enough energy to kick up that electron. So the photons pass through because they can't be absorbed.
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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?
Transmission occurs when UV rays pass directly through the plastic, reflection happens when the UV rays bounce off the surface of the plastic, and absorption occurs when the UV rays are absorbed into the plastic. The Number of UV Rays that Penetrate Plastic Depends on its Thickness
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does uv light pass through plexiglass
