1
JEE Main 2025 (Online) 4th April Evening Shift
Numerical
+4
-1
In a Young's double slit experiment, two slits are located 1.5 mm apart. The distance of screen from slits is 2 m and the wavelength of the source is 400 nm . If the 20 maxima of the double slit pattern are contained within the central maximum of the single slit diffraction pattern, then the width of each slit is $x \times 10^{-3} \mathrm{~cm}$, where $x$-value is _________ .
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2
JEE Main 2025 (Online) 3rd April Morning Shift
Numerical
+4
-1
Two coherent monochromatic light beams of intensities 4I and 9I are superimposed. The difference between the maximum and minimum intensities in the resulting interference pattern is $x \mathrm{I}$. The value of $x$ is___________ .
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3
JEE Main 2025 (Online) 2nd April Morning Shift
Numerical
+4
-1
If the measured angular separation between the second minimum to the left of the central maximum and the third minimum to the right of the central maximum is $30^{\circ}$ in a single slit diffraction pattern recorded using 628 nm light, then the width of the slit is _______ $\mu$m.
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4
JEE Main 2025 (Online) 28th January Evening Shift
Numerical
+4
-1
A thin transparent film with refractive index 1.4 , is held on circular ring of radius 1.8 cm . The fluid in the film evaporates such that transmission through the film at wavelength 560 nm goes to a minimum every 12 seconds. Assuming that the film is flat on its two sides, the rate of evaporation is ____________ $\pi\times 10^{-13} \mathrm{~m}^3 / \mathrm{s}$.
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Questions Asked from Wave Optics (Numerical)
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