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Black lights have several uses for a serious philatelist. On valuable stamps, ultraviolet light can reveal repairs. Of more interest is identifying tagging. Phosphorus inks placed on stamps were used to orient envelopes and apply the cancellations in the correct corner.
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Do ultra violet lights kill germs?
Yes, they are often used to sterilise food for that very reason.
Which fish has capability to see both infrared and UV lights?
bees and butterflies can see ultra violet
Do diamonds turn blue under ultra violet lights?
The phenomenon you describe is florescence. You can read more about it, below.
Can ultra violet light be used for mobile phone communications?
no only mobile phone can communicate lights can't. :)
How do sunbeds work?
Sunbeds work by using UV (Ultra Violet) lights to burn the skin causing a tan
Individual wavelength of visible ultra violet?
Ultra violet light is not visible!
What is wave length of ultra violet rediation?
the length of an ultra violet wave is about 0.4 nanometers
How do you say ultra violet camera in French?
une caméra ultra-violet
When was Ultra Violet - Bananarama album - created?
Ultra Violet - Bananarama album - was created in 1994-09.
Is Ultra Violet DC or Marvel?
Ultra Violet isn't DC or Marvel she's Screen Gems
What has the author Eleanor Hilda Russell written?
Eleanor Hilda Russell has written: 'Ultra-violet radiation and actinotherapy' -- subject(s): Ultra-violet rays, Spectrum, Ultra-violet, Phototherapy
Which visible colors has the most energy?
one of them is violet and ultra violet
