Question

Diffraction is common in sound but not in light waves, why ? .

Answer 1

$\underline{\mathfrak{Answer}}$

For diffraction of a wave, the size of particle/obstacle/aperture should be of the order of warve length of wave. Since the average wavelength of visible light is of the order of 10-6 m and obstacle/aperture of this size are rare, therefore, diffraction of light is not common.

But in case of sound, the wave length of waves is 1 -2 m and obstacle/aperture of this size are readily available, therefore $\bold{diffraction}$ of sound is quite often.

$\underline{\mathfrak{thanks}}$


$\bold{hope\: it\: helps}$

Answer 2

$\underline{\mathfrak{Answer}}$

For diffraction of a wave, the size of particle/obstacle/aperture should be of the order of warve length of wave. Since the average wavelength of visible light is of the order of 10-6 m and obstacle/aperture of this size are rare, therefore, diffraction of light is not common.

But in case of sound, the wave length of waves is 1 -2 m and obstacle/aperture of this size are readily available, therefore $\bold{diffraction}$ of sound is quite often.

$\underline{\mathfrak{thanks}}$

$\bold{hope\: it\: helps}$