PPT-UV Light Ultraviolet Light

Ultraviolet UV light falls in the range of the EM spectrum between visible light and Xrays UV light which comes from the sun is invisible to the human eye It makes blacklight posters glow and is responsible for summer tans and sunburns. The . ozone layer. is a layer in . Earth's atmosphere. which contains relatively high concentrations of . ozone. (O. 3. ). . This layer absorbs 97–99% of the . Sun. 's high frequency . ultraviolet light. Screens. ‘How it works?’. Cathode Ray Tubes. Output devices. Cathode Ray Tubes. Television screens used to use a technology called, cathode ray tubes (CRT). An electron gun emitted electrons inside a glass tube onto phosphor atoms at the end of the glass tube, causing the phosphor atoms to light up. The electron gun scanned the screen many times per second, producing an image. . ULTRAVIOLET RADIATION SPECTRUM. UVA (Longwave Radiation). Range 320-400 nm. Erythrogenic activity is weak, however penetrates dermis. Responsible for development of slow. natural tan. Most drug-induced photosensitivity rxn occurs . Potential UV Hazard. Hazard: . Ultraviolet light (UV-C). Recommendation: . Switch off UV while working. Source: (http. ://. www.uvm.edu/safety/lab/hazards-of-ultraviolet-light). “. UV-C. does not penetrate skin, but is absorbed by organic materials… therefore used as germicidal …” in biological safety hoods.. Systems and those with Cortical/. Cerebral Visual Impairment. This presentation belongs to APH.. If you’d like to borrow this presentation, APH will be glad to loan it to you provided that you:. Do not change it.. Sunscreen product ) . ). Mr. Yassen Qawasmi. Prepared by :. Haya al natsheh . Hanen Ju'beh. Introduction. 1- what is UV filter?. 2- what types UV ray? and what they doing for the skin ? . 3-what is combination of UV filter?. Next be sure that you have at least 4 colored pencils to work with today at your table.. Electromagnetic Waves . Spectrum Foldable. Please get your notebook and add this title to the next available page. Claude Monet’s Water Lilies. (1840-1926). Impressionists. Short loose brush strokes. Different colors allowing eyes to mix the colors. Vincent Van Gogh’s Sunflowers. (1853 – 1890). Post Impressionists. Light. What is light?. . It is the electromagnetic . radiation that can be . perceived . by the human eye. It is made up . of.  . electromagnetic waves.  with wavelengths between . 4 . × 10. -7. Extreme Ultraviolet Light Sources Mark Hrdy 12/05/2017 Outline Background/Motivation Resolution Limit UV Light Generation EUV Introduction Technical Challenges: Optics Masks/Pellicles Light Production noticing a momentary streak of light in the night sk y , what they really see are meteors burning up as they enter the Earth ’ s atmosphere—nothing to do with stars at all. Howeve r , Mir Photochemotherapy Treatment (Ultraviolet A [PUVA] and B [UBV]) Page 1 of 6 Origination: 09/27/07 Revised: 11/30/20 Annual Review: 11/ 0 5 / 20 Purpose : To provide Phototherapy and Photochemotherap U-AU-BU-CVACUU-UV100200280315400Hg - ow-pessueLamp 254 nm780Wavelength nm951 296-3480 454-2725 infoaquauvcom AquaUVcomResourcesAqua Ultraviolet has over four decades of experience in manufacturing a Unit-3. DR ANIL KUMAR. assistant professor, . vcc. , . bvc. (. basu. ), . patna. VITAMIN D DEFICIENCY. Vitamin D is thought of as the “sunshine vitamin”.. The two major natural sources of vitamin D are .