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:

To burn a paper with light a convex lens is better because it focusses all the incident parallel sunrays to its focus. If the paper is kept at focus it will burn due to high concentration of energy.


Answered by  | 24th Mar, 2009, 11:34: AM

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