RE: Ångstrøm symbol

From: Hohberger, Clive (
Date: Wed Feb 19 2003 - 14:02:33 EST

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    Almost correct-- the Ångstrom is actually 0,1 nanometers. When I studied
    astronomy back in the 1960's everything connected with optical spectra was
    given in Ångstroms. So 670nm would be 6700 Å.

    -----Original Message-----
    From: Wm Sean Glen []
    Sent: Tuesday, February 18, 2003 8:18 PM
    To: David Oftedal;
    Subject: Re: Ångstrøm symbol

    Dear David,

    There is a letter in the Swedish alphabet (capital A with a ring above).
    Some Swede by the name of Ångstrøm was a scientist and worked with light and
    color. He came up with a convenient was to accurately measure the color of
    light. That measurement was named after him and given the symbol (capital A
    with a ring above). The next time you see one of those laser pointer pens
    take a look at the label. It will say 670 nm which means 670 nanometers. The
    red light has a wavelength of 670 billionths of a meter. An Ångstrøm is
    equal to ten nanometers so that red light would be described as 67Å. When
    Kodak develops your film, they calibrate their equipment by looking for some
    common color like sky blue and making that equal to a standard Ångstrøm
    value. I don't know why Unicode implemented it twice. We use a regular old k
    for kilo and M for Mega. When it comes to other scientific symbols, we still
    use a Greek uppercase omega to represent ohms of electrical resistance and
    lowercase omega to represent rotational speed.
    Wm Seán Glen

    -----Original Message-----
    From: David Oftedal < <> >
    To: <> <
    <> >
    Date: Saturday, February 15, 2003 8:54 AM
    Subject: Ångstrøm symbol


    One of you mentioned that Unicode is reluctant to make symbols for
    things like TM, that are really only composed of other characters.

    Yet I read on someone's website that there's an Ångstrøm (Or Ångström, I
    Am Not A Swede) symbol that's exactly identical to the Scandinavian Å.

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