Question

Why is the diffraction of sound waves more evident in daily experience than that of light wave?

Answer 1

We know that frequencies of sound waves varies from $20Hz$ to $20,000Hz$, 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 $0.7micron$ 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.