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प्रश्न
We can burn a piece of paper by focussing the sun rays by using a particular type of lens. Name the type of lens used for the above purpose. Draw a ray diagram to support your answer.
A piece of paper can be burnt by focusing the sun rays using a type of lens. Name the type of lens used and draw a ray diagram to support your answer.
आकृति
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उत्तर
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