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प्रश्न
Which portion of an incoming wavefront is delayed more by a thin prism, and why?
विकल्प
The ray going through the centre; it travels a shorter path.
The lower portion; it travels through the greatest thickness of glass.
Rays near the edge of the lens; they travel through the greatest thickness of glass.
The central part; it passes through the thickest portion of the lens.
MCQ
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उत्तर
The lower portion travels through the greatest thickness of glass in a thin prism. Because light is slower in glass, this portion is delayed more.
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