Your light source does not emit monochromatic radiation! Hand lamps used to inspect TLCs typically have coated low-pressure mercury lamps. While the maximum of the radiation density might be centred around 360 nm, the full with at half maximum is - roughly estimated - about 30 nm or more. The UV attenuation results from both reflection and scattering of UV radiation and visible light (clarifying the opaqueness of these sunscreen formulations) and from UV absorption. UV attenuation properties of these two particles are complementary; TiO 2 being primarily a UVB absorbing compound, while ZnO is more efficient in UVA absorption Most acrylic plastics will allow light of wavelength greater than 375 nm to pass through the material, but they will not allow UV-C wavelengths (100–290 nm) to pass through. Even very thin acrylic sheets of less than 5 millimeters (mm) do not let UV-C light penetrate. Therefore, you will not be able to use standard acrylic plastic for your All organic materials absorb light in the UV region of the spectrum. The mechanism of this absorption depends on transitions between electronic energy levels of the bonds within the materials; the absorption of a photon causes an upward transition, leading to an excitation of the electronic state of the solid. Styrenics absorb across a broader range of IR than other plastics. Anything with carbonyl functionality will strongly absorb between 1600 and 1750 cm -1. Polyesters, polycarbonates and acrylics absorb around 1745 cm -1. You need not concern yourself with nylons as they have poor transparency. Cellulose acetate is photo chemically degraded by UV wavelengths shorter than 280 nm, but has limited photo degradability in sunlight due to the lack of chromophores for absorbing ultraviolet light. Photo degradability can be significantly enhanced by the addition of titanium dioxide, which is used as a whitening agent in many consumer products. The fact is, lots of pure plastics simply cannot absorb UV radiation, putting your project and its components at severe risk. You can, of course, avoid UV degradation in plastics. Blockers, stabilizers or absorbers can be used to great effect, while titanium dioxide may also be beneficial. Visible light and ultraviolet (UV) light are both forms of electromagnetic radiation, and waves of each travel at the same speed. Human eyes are unable to see UV light because it is not in the visible range of the electromagnetic spectrum. If the frequency of one UV light wave is twice that of a visible light wave, how will their wavelengths The light-coloured and glossy boxes you have in your photos are the safer ones, these will reflect most of the light. The black and matt finish cardboard boxes will just absorb the light (including UV) and get both the box and it's contents hot. Plastic DVD's and CD's warp in the heat and this will be a bigger problem than anything else. eTdvOIB.

does plastic absorb uv light