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.
Yes, they are often used to sterilise food for that very reason.
bees and butterflies can see ultra violet
no only mobile phone can communicate lights can't. :)
Ultra violet light is not visible!
une caméra ultra-violet
Ultra Violet isn't DC or Marvel she's Screen Gems
Ultra Violet - Bananarama album - was created in 1994-09.
Yes, "ultra-violet" is typically hyphenated when used as an adjective before a noun.
Eleanor Hilda Russell has written: 'Ultra-violet radiation and actinotherapy' -- subject(s): Ultra-violet rays, Spectrum, Ultra-violet, Phototherapy
You can see visible light but not ultra violet light.
all the legendaries in fire red and leaf green are in ultra violet.
The sun.