shade number

shade number
   a unit of light transmission for the protective glasses used in welding. If T is the fraction of visible light transmitted, the shade number is 1 + 7(-log10 T)/3. For example, if 1% of the light is transmitted, the shade number is 4.

Dictionary of units of measurement. 2015.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Shade tolerance — is an ecological concept that refers to plants abilities to tolerate low light levels. The term is also used in horticulture and landscaping, although in this context its use is sometimes sloppy, especially with respect to labeling of plants for… …   Wikipedia

  • Shade sail — A shade sail is a device to create outdoor shade based on the same technology as a ships sail. Shade sails use a flexible membrane tensioned between three or more anchor points. HistoryAncient Egyptians and later the Greeks and Romans used large… …   Wikipedia

  • shade — shade1 [ ʃeıd ] noun ** ▸ 1 where light does not go ▸ 2 screen/cover ▸ 3 form of a color ▸ 4 pair of sunglasses ▸ 5 slightly different form ▸ 6 spirit of someone dead ▸ 7 something reminding someone of something ▸ 8 small amount/number ▸ +… …   Usage of the words and phrases in modern English

  • Shade Sheist — Infobox musical artist Name = Shade Sheist Img capt = Img size = Landscape = Background = solo singer Birth name = Tramayne Thompson Alias = Shady Sheist, Shady Montage Origin = Los Angeles, California, Genre = G Funk Gangsta rap Urban Occupation …   Wikipedia

  • number game — Introduction       any of various puzzles and games that involve aspects of mathematics.       Mathematical recreations comprise puzzles and games that vary from naive amusements to sophisticated problems, some of which have never been solved.… …   Universalium

  • number 2 pencil — noun a) A pencil which produces a specific shade of dark gray. One can usually identify a number 2 pencil by looking for the number 2 conspicuously emblazoned on the pencil. Often required for test taking and the completion of official forms. I… …   Wiktionary

  • A Whiter Shade of Pale — Infobox Single Name = A Whiter Shade of Pale Artist = Procol Harum B side = Lime Street Blues Released = 12 May 1967 Format = 7 Recorded = Olympic Studios Genre = Psychedelic rock Progressive rock Length = 4:03 Label = Deram Records Writer = Gary …   Wikipedia

  • The Missing Shade of Blue — is an example introduced by the Scottish philosopher David Hume to show that it is at least conceivable that the mind can generate an idea without first being exposed to the relevant sensory experience. It is regarded as a problem by philosophers …   Wikipedia

  • Every Shade of Blue — Infobox Single Name = Every Shade of Blue Artist = Bananarama from Album = Ultra Violet / I Found Love B side = Released = August 1995 Format = 12 single, CD single Recorded = January 1995 Genre = Pop, Dance Length = Label = Avex Trax (Japan)… …   Wikipedia

  • Will Shade — Infobox musical artist 2 Name = Will Shade Background = khaki Alias = Son Brimmer Born = birth date|1898|2|5|mf=y Died = death date and age|1966|9|18|1898|2|5|mf=y Origin = Memphis, Tennessee, U.S. Instrument = Vocals, guitar, harmonica, and… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”