Diffraction of sound is common but not common in light waves. Why?

Diffraction of light Diffraction of light is the phenomenon of bending of light round corners of an obstacle or aperture and spreading into the geometrical shadow of the diffracting object. The condition for diffraction of light is the size of the aperture should be comparable to the wavelength of incident light. so in daily life, we find that diffraction of sound is more common than the diffraction of light. width of central maxima is {formula= ((2lambdaD)/d) } Two student are separated by a 5 m partition wall in a room that is 10 m high. if both light and sound waves bend around obstacles, we find that the students are unable to see the each other even though they can converse easily. it is due to

Diffraction of light Diffraction of light is the phenomenon of bending of light round corners of an obstacle or aperture and spreading into the geometraicl shadow of the diffracting object. The condition for diffractio of light is the size of the aperature should be comparable to the wavelength of incident light. so in daily life, we find that diffraction of sound is more common than the diffraction of light. width of central maxima is {formula= ((2lambdaD)/d) } In single slit diffraction experiment, if the width of the slit is doubled, if the intensity of central fringe diffraction band becomes.

Which of the following phenomenon is not common to sound and light waves?

Why is the diffraction of sound more evident in daily life that of the light waves?

Radio waves diffract pronouncedly around building, while light waves do not. Why?