Multiple choice

On holding _______ between the path of sun rays and a paper at a specific distance, paper gets burnt.

  1. convex lens

  2. concave lens

  3. plain glass

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Convex lens converges the light coming from sun and therefore heats it,  which in turn burns the paper after holding it for a few minutes.

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