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CBSE - 10th Study Notes
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5/31/2011 4:04:58 AM
CHATURBHUJ PODDAR

icon Preferenc Of Black Umbrella To A White One Even In Summer?
  Why one prefers even in summer a black umbrella to white one ?

 
5/31/2011 4:20:02 AM
CHATURBHUJ PODDAR

icon Re: Preferenc Of Black Umbrella To A White One Even In Summer?
  In actual practice, a black umbrella provides a better shade than a white one because some of the Sunlight does get transmitted through the thin white cloth.This advantage out - weighs the disadvantage of the black umbrella absorbing more of light energy.This is so because the umbrella is not quit in contact with body of the person holding it.

 
 
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