Question:

What type? why? at that distance?? waaaah??

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Suppose you would like to start a fire by focusing sunlight onto a piece of paper, what type of spherical mirror would you use?

Why?

At what distance from the mirror should the paper be held for best results?

--> answer should be related to PHYSICS.

-tsk.tsk.

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  1. A parabolic (concave) mirror collects and concentrates the sun rays. Just look at the one they light the olympic fire with.

    The distance depends on the curvature of the mirror.  

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