JEE Main 2025 (Online) 4th April Morning Shift | Wave Optics Question 30 | Physics

In a Young's double slit experiment, the slits are separated by 0.2 mm . If the slits separation is increased to 0.4 mm , the percentage change of the fringe width is :

$25 \%$

$50 \%$

$0 \%$

$100 \%$

JEE Main 2025 (Online) 3rd April Evening Shift

MCQ (Single Correct Answer)

-1

Two monochromatic light beams have intensities in the ratio 1:9. An interference pattern is obtained by these beams. The ratio of the intensities of maximum to minimum is

$8: 1$

$4: 1$

$3: 1$

$9: 1$

JEE Main 2025 (Online) 3rd April Evening Shift

MCQ (Single Correct Answer)

-1

Width of one of the two slits in a Young's double slit interference experiment is half of the other slit. The ratio of the maximum to the minimum intensity in the interference pattern is :

$3: 1$

$(2 \sqrt{2}+1):(2 \sqrt{2}-1)$

$9: 1$

$(3+2 \sqrt{2}):(3-2 \sqrt{2})$

JEE Main 2025 (Online) 3rd April Evening Shift

MCQ (Single Correct Answer)

-1

A monochromatic light of frequency $5 \times 10^{14} \mathrm{~Hz}$ travelling through air, is incident on a medium of refractive index ' 2 '. Wavelength of the refracted light will be :

400 nm

300 nm

600 nm

500 nm

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