Polarised light and the super sense you didn't know you had - light and polarization

 2024-10-17 05:30:32

Typesof illuminationPDF

Longwave or Ultraviolet A (UVA) lamps emit UV light from 315 to 400nm. UVA lamps are used for bacterial identification, staining, electrophoresis, pesticide analysis, fluorescence photography, visualizing nucleic acids, and other genetic work. UVA is also useful for monitoring chlorination, in fluorochemistry, titrations, thin-layer chromatography (TLC), food contamination identification, water testing, and forensic applications.

Lamps with two 25-watt tubes providing hours of UV illumination with adjustable handles and mounting bracket for hanging

Photoactivate crosslinkers in UV-crosslinking methods with these compact, UV-lamps with 252nm, 302nm and 365nm short to long wavelength bulbs.

Illuminationlighting design

Ultraviolet lamps that perform a variety of analytical and sterilizing functions as well as accessories and replacement parts for UV lamps. Products include handheld UV lamps, benchtop UV lamps, UV bulbs, UV tubes, and UV viewing cabinets.

Bench lamps that offer a choice between longwave, shortwave or midrange wavelengths for use in sterilization/sanitation and fluorescence/inspection applications. UVP XX-Series UV Bench Lamp, 115V are designed for use in the United States.

LEDilluminationlights

Shortwave or Ultraviolet C (UVC) lamps emit light in the 100 to 280nm range. Often used as germicidal lamps, UVC is commonly used to disinfect surfaces in laboratories and food-processing facilities and to disinfect water. UVC lamps are also used to cure polymers and for fluorescent analysis, in fluorochemistry, pesticide analysis, DNA and other biochemical testing, microbiological testing, electrophoresis, and photochemistry.

Medium-wave or Ultraviolet B (UVB) lamps emit light in wavelengths from 280 to 315nm and are used for gel electrophoresis, viewing, and other procedures. UVB light is also used in transilluminators. Gels are stained with fluorescent dyes that bind to the nucleic acids to make them visible under UVB light. This technique helps researchers size PCR products, quantify DNA, and verify the integrity of extracted RNA.

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Two sources of lights of illuminating powers in the ratio1:2 are placed on a line 2 meter apart. At what point is the spae between them equally illuminated?

Illumination of lightformula

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A round table of radious r is illuminated by a lamp of luminous intersity (candlepower) I hanging above its centre What should be the height of the lamp above the table for the illuminance of the table fringe to be miximum? What is its value ? What is the illuminance at the centre of the table in these condition?

In contrast to lamps with wavelength filters and very narrow spectrum, this lamp has a broader spectrum for quick analyses or screening purposes