Sound is a mechanical wave But light waves
, sound waves are longitudinal. The sound waves are transverse
speed of sound in air is less than the light
wavelength of the sound is the same size as the object size as the wavelength of light, much shorter. And both light and sound waves symbolized. The sound travels around the corner. But light can not move around the corner. That represents a treasure farming Ben. Optical properties, but not the party, Ben. Due to the wave diffraction well when the size of the object (the building), the obstacles are similar in size to the wavelength of the wave.
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