to burn a paper withsunlight which one is better convex lense or concave mirror.
Asked by bobbobby | 22nd Mar, 2009, 12:36: PM
Expert Answer:
Your question is already answered please go through below link
http://www.topperlearning.com/discussion-cat.php?event=cmlist&dscId=30&topId=18784&dstype=2
Answered by | 24th Mar, 2009, 11:35: AM
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