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Fringe Width in YDSE

A rectangular...

Question

A rectangular glass slab is kept over two coloured dots viz. blue and red. When viewed from top, which dot will appear closer to the eye?

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Solution

Red dot will appears closer it is because of its higher wavelength (lower refractive index), it will be deflected less than the blue color. So, because oft his, it will travel farther than blue.

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