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JEE Advanced Paper 2 2024 Paper

SECTION 4

• This section contains TWO (02) paragraphs.
• Based on each paragraph, there are TWO (02) questions.
PARAGRAPH I
Que No -: 14-15
In a Young's double slit experiment, each of the two slits A and B , as shown in the figure, are oscillating about their fixed center and with a mean separation of 0.8 mm . The distancebetween the slits at time t is given by d=(0.8+0.04sin‌ωt)‌mm , where ω=0.08‌rad‌ s−1 . The distance of the screen from the slits is 1 m and the wavelength of the light used to illuminate the slits is 6000Å . The interference patternon the screen changes with time, while the centralbright fringe (zeroth fringe) remains fixed at point O .

Question : 14

Total: 51

The 8‌th ‌ bright fringe above the point O oscillates with time between two extreme positions. The separation between these two extreme positions, in micrometer ( µm ), is _______ .

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