metal balls forum

If you shine an ultravioletlight on the metal ball of a negatgively charged electroscope, it will discharge.

Ol Lady , Wednesday, 11th of August 2010 09:39:45 AM

If you shine an ultraviolet light on the metal ball of a negatively charged 
Ol Lady
electroscope, it will discharge.But if the electroscope is positively 
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charged, it wo not discharge.Can you venture an explanation?
 
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Hell Hound , Thursday, 12th of August 2010 02:51:10 AM

UV light causes electrons to be given off. If UV light is  
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shined at an already negative metal ball, it will just make it more  
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negative.  
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