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प्रश्न
What feature appears in the emerging wavefront of a plane wave passing through a thin convex lens?
पर्याय
The greatest thickness of glass in the lower portion
A depression at the centre
A tangent plane CE
A tilt in the emerging wavefront
MCQ
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उत्तर
The centre of the wavefront is delayed more than its other parts. This unequal delay produces a depression at the centre of the emerging wavefront.
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