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2. Infrared cut-off filter - Wikipedia

   en.wikipedia.org/wiki/Infrared_cut-off_filter

   Thus a blue filter makes the picture look blue. A blue filter marginally allows more light in the blue wavelength to pass resulting in a slight shift of the color temperature of the photo to a cooler color. Because of this, the term "IR filters" is commonly used to refer to filters that pass infrared light while completely blocking other ...

3. Business card - Wikipedia

   en.wikipedia.org/wiki/Business_card

   A Oscar Friedheim card cutting and scoring machine from 1889, capable of producing up to 100,000 visiting and business cards a day. Business cards are cards bearing business information about a company or individual. [1] [2] They are shared during formal introductions as a convenience and a memory aid.

4. Blue light spectrum - Wikipedia

   en.wikipedia.org/wiki/Blue_light_spectrum

   The blue light spectrum is an essential part of the visible spectrum with wavelengths of about 400-480 nm. [1] Blue light is primarily generated by Light-Emitting Diodes (LED) lighting and digital screens, it has now become prevalent in the world around us. [2] LED lighting creates white light by combining blue light with other wavelengths ...

5. iPad: Just What the Doctor Ordered - AOL

   www.aol.com/news/2011-12-06-ipad-just-what-the...

   As if Apple's (NAS: AAPL) iPad needed any help in unit sales growth, another market now promises to help take the dominating tablet to new heights: the medical market. Apple acknowledged the ...

6. Wratten number - Wikipedia

   en.wikipedia.org/wiki/Wratten_number

   Wratten number. Wratten numbers are a labeling system for optical filters, usually for photographic use comprising a number sometimes followed by a letter. The number denotes the color of the filter and its spectral characteristics, and these numbers can be grouped into broad categories, but the numbering system is arbitrary within a group and ...

7. Beirut flights cancelled or delayed amid fears of Israeli attack

   www.aol.com/news/beirut-airport-cancels-flights...

   (Reuters) -Flights to and from Beirut airport were cancelled or delayed on Monday as tensions escalated between Israel and armed political group Hezbollah after a strike in the Israeli-occupied ...