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प्रश्न
What happens to a plane wave as it passes through a thin prism?
विकल्प
A tilt in the emerging wavefront
A depression at the centre
A spherical wave that converges to the focal point F
A reflected wavefront CE
MCQ
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उत्तर
Different portions of the wavefront undergo different delays in the prism. The resulting unequal advance causes a tilt in the emerging wavefront.
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