Physics · 2019
NEET 2019 · 20 May · Code G1 · Q178
Angular width of the central maximum in the Fraunhofer diffraction for λ=6000 is θ_0. When the same slit is illuminated by another monochromatic…
Angular width of the central maximum in the Fraunhofer diffraction for $\displaystyle \lambda=6000 \AA$ is $\displaystyle \theta_0$. When the same slit is illuminated by another monochromatic light, the angular width decreases by $\displaystyle 30$%. The wavelength of this light is :
Official answer
(2)
$\displaystyle 4200 \AA$
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