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Black light

  1. Oct 5, 2006 #1

    daniel_i_l

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    Gold Member

    Why does black light (florecent light without the coating) light up only white things?
     
  2. jcsd
  3. Oct 5, 2006 #2
  4. Oct 5, 2006 #3
    I believe what you are asking is the same type of question as:
    "Why does red light only light up red and white things?"
    I think it's the same answer too ;)

    Whatever howstuffworks says is probably more correct and thorough
     
  5. Oct 5, 2006 #4

    DaveC426913

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    Gold Member

    Um, if that were true, the object would only emit UV. In fact, it is emitting a different wavelength than that which it is absorbing.
     
  6. Oct 5, 2006 #5
    Yes, but read this
     
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