Why is the diffraction of sound waves more evident in daily experience than that of light wave?
We know that frequencies of sound waves varies from $$20 Hz$$ to $$20,000 Hz$$, so its corresponding wavelength varies from $$15m$$ to $$15mm$$ respectively. The size of slit (almost) becomes comparable to wavelength of sound so diffraction of sound wave takes place easily.
But the wavelength of visible light varies from $$0.4$$ to $$0.7 micron$$ which is very small. So the size of most of the slits is not comparable with wavelength of visible light, due to this diffraction of light cannot take place.