Same chapter3 marksDifficulty: Medium
Distinguish between interference and diffraction of light.
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3 marksDifficulty: Medium
In a double-slit experiment the fringe width is 0.5 mm. What happens to it if the whole apparatus is immersed in water of refractive index 4/3?
Original Khojo Papers practice question — not from a past board paper.
Answer
It becomes 0.375 mm.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The wavelength in water is the wavelength in air divided by the refractive index, and the fringe width is proportional to the wavelength, so it becomes 0.5 × 3/4.
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