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प्रश्न
Define the principal axis of a convex lens.
परिभाषा
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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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क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 2: Refraction of Light - Exercise 3 [पृष्ठ १०६]
