B.P.S.C. B.A.O, 2024
A beam of blue light was used to obtain diffraction pattern using a diffraction grating. If yellow light is used by replacing the blue light
adiffraction pattern becomes narrower and crowded together
bdiffraction pattern does not change
cdiffraction pattern becomes broader and farther apart✓ Correct
dNone of the above
Explanation
If yellow light is used instead of blue light, in a diffraction grating then since yellow light has a longer wavelength than blue light, the diffraction pattern becomes broader and the fringes become more widely spaced.
general-science