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
- DNone of the above
Show answer and explanation
Correct answer: (c) Diffraction pattern becomes broader and farther apart
Explanation
In diffraction, the spreading of light and the spacing of the pattern are proportional to the wavelength.
Yellow light has a longer wavelength than blue, so with yellow light the pattern becomes broader and the lines lie farther apart.