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Which one of the following can be used to focus sunlight?
مندرجہ ذیل میں سے کون سا سورج کی روشنی کو فوکس کرنے کے لیے استعمال کیا جا سکتا ہے؟
  1. Concave lens
  2. Plane mirror
  3. concave mirror
  4. convex mirror
  5. none of these
Explanation

In solar furnaces, concave mirrors are used for converging the sun's rays.

concept:

Concave mirrors reflect and focus incoming light rays (parallel) at a point, called the focus point.

Depending on the distance of an object from the reflecting surface, different types of images are formed.

ND06-08-2023



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