The diffraction pattern of a light of wavelength 400 ~nm diffracting from a slit of width 0.2 ~mm is focused on the focal plane of a convex lens of focal length 100 ~cm. The width of the 1^(st) secondary maxima will be:

Optics: JEE Main 2024 Physics question

JEE Main 2024 · 30 Jan, Morning shift · Q8406

JEE Main 202430 Jan, Morning shiftPhysicsMediumOptics190× since 2002

The diffraction pattern of a light of wavelength

400 \mathrm{~nm}

diffracting from a slit of width

0.2 \mathrm{~mm}

is focused on the focal plane of a convex lens of focal length

100 \mathrm{~cm}

. The width of the

1^{\text {st }}

secondary maxima will be :