When sunlight is concentrated on a paper placed at the principal focus a convex lens what happens to the paper and why
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when sunlight is concentrated on a paper placed at the principal focus a convex lens ,then the paper starts to burn because the sunlight gets focused on a small region.
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when sunlight is concentrated on a paper placed at the principal focus a convex lens ,then the paper starts to burn because the sunlight gets focused on a small region.
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