Physics, 05.10.2019 05:00 redthangracing

Mirror on which sun rays are falling is moved in such a way that asap and bright spot of light is formed on a paper the concave mirror and the paper are kept in their places for a few minutes then what do you observe explain the reason of your observation?

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Mirror on which sun rays are falling is moved in such a way that asap and bright spot of light is fo...