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प्रश्न
Define the principal axis of a convex lens.
व्याख्या
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उत्तर
An imaginary line that passes through the optical centre and the centre of curvature of both faces of the lens, and is perpendicular to the faces, is known as the principal axis.
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या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Refraction of Light - Exercise 3 [पृष्ठ १०६]
