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प्रश्न
Define the principal focus of a convex lens.
व्याख्या
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उत्तर
The principal focus of a convex mirror is a point on its principal axis from which a beam of light rays, initially parallel to the axis, appears to diverge after being reflected from the convex mirror.
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या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Refraction of Light - Exercise 3 [पृष्ठ १०६]
