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Q & A: concave lenses for cooking?

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Most recent answer: 02/01/2011
Q:
how are concave lenses used for cooking?
- faith (age 16)
kenya
A:
Faith- That's an interesting question, but I can't think of an answer. Convex lenses are useful for cooking because they focus the sun's rays, so they can be used to provide heat for cooking when the sun is the best or only energy source available. I just don't see where concave lenses would be useful in these processes. Maybe another reader knows.

Mike W.

(published on 02/01/2011)

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