View Full Version : Emit light
kesavan
Aug 8, 2008, 10:27 AM
How some watches needle emit green light when it in dark area?
amricca
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
Aug 8, 2008, 10:36 AM
Where that paint get energy to glow?
Capuchin
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/physics/emiting-light-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
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.