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    kesavan's Avatar
    kesavan Posts: 118, Reputation: 1
    Junior Member
    		  
    #1

    Aug 8, 2008, 10:27 AM
    Emit light
    How some watches needle emit green light when it in dark area?
    amricca's Avatar
    amricca Posts: 851, Reputation: 92
    Senior Member
    		  
    #2

    Aug 8, 2008, 10:32 AM
    Luminous paint is used on the hands which glows in the dark. It is a water-based acrylic varnish containing the luminous material.
    kesavan's Avatar
    kesavan Posts: 118, Reputation: 1
    Junior Member
    		  
    #3

    Aug 8, 2008, 10:36 AM
    Where that paint get energy to glow?
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
    		  
    #4

    Aug 8, 2008, 10:51 AM
    Hi Kesavan, I gave a pretty in depth answer to your question the last time you asked it. It can be found here:

    https://www.askmehelpdesk.com/physic...ht-240750.html

    There is no need to post a new topic!

    Amricca, as my answer in the above link says, the material is phosphorescent, not luminescent.
    amricca's Avatar
    amricca Posts: 851, Reputation: 92
    Senior Member
    		  
    #5

    Aug 8, 2008, 10:56 AM
    Hey thanks, I learned something. I looked it up on line to answer his question, guess the sites I looked at had it wrong.
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