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What's the wavelength of pure blue?

What's the wavelength of pure blue?

  • 430nm

    Votes: 0 0.0%
  • 435nm

    Votes: 1 2.1%
  • 440nm

    Votes: 0 0.0%
  • 445nm

    Votes: 4 8.5%
  • 450nm

    Votes: 8 17.0%
  • 455nm

    Votes: 2 4.3%
  • 460nm

    Votes: 21 44.7%
  • 465nm

    Votes: 5 10.6%
  • 470nm

    Votes: 2 4.3%
  • 475nm

    Votes: 4 8.5%

  • Total voters
    47

zyxwv99

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May 6, 2013
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Obviously there can be color shift due to differences in brightness, not to mention color environment, body temperature, etc., but I'm going with 460nm.

447nm is indigo, except in a laser of more than 1mW, when it will shift towards blue because of Bezold–Brücke. (Bezold?Brücke shift - Wikipedia, the free encyclopedia)

473nm is part-way between blue and sky blue, which is something else altogether.
 

Atomicrox

Well-known member
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Jun 22, 2011
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@zyxwv99: I had noticed that effect before, good to know it has a name :)

Results so far:
votes: 37
average: 457.7nm
standard deviation: 8.4nm
 

Teslanium

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Joined
Feb 22, 2012
Messages
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I chose 460 as a nice "mid" blue. 450 is more "cobalt" blue, and 470 begins to me to have just a bit of cyan added, but still a nice color.

Of course, ALL visible single-spectral-line colors look good to me!:pop:

2c,
T.
 




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