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Solve the following.
Two identical rectangular slits apart are illuminated with a monochromatic light of wavelength …
Two identical rectangular slits $5\text{ mm}$ apart are illuminated with a monochromatic light of wavelength $600\text{ nm}$. The screen is kept $1.2\text{ m}$ away from the slits.
(i)[1.5]
Calculate the distance between the $5^{\text{th}}$ bright fringe (band) on one side and the $3^{\text{rd}}$ bright fringe on the other side of the central bright band.
(ii)[1.5]
What will be the change in the interference pattern if the given light is replaced with monochromatic light of wavelength $500\text{ nm}$?
Answer
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From ISC 2025 Physics Paper 1, question 16.