How to use mirrorr to burn paper

Question

How to use mirrorr to burn paper

Answer 1

The mirror must be parabolic in shape.  Place the paper at the focal point and expose to bright sunlight.

Answer 2

use magnifying glass (or convex lens) to focus (concentrate) the sunlight (infrared rays) on the piece of paper.

Answer 3

use a magnifying glass to focus the light hitting it.

Answer 4

You can focus sunlight beams with a concave mirror, just like with a magnifing glass. It's a little difficoult to put paper into the focal point without masking out the lightsoure (the Sun).