science light

why is it so that as the sound waves propagates from one place to other in air the air itself isn't required to move from one place to the other?

vibrating object disturb the air particle near it. the air particles get compressed as well as start vibrating and gain energy. these particles than transfer than energy in other layer of particles near them. in this way the region of compression and rare fraction is created and hence sound is produced. so in sound production only the transfer of energy of vibrating particles take place.

how can you explain the statement ‘we can't see objects in dark room’?

light enables to see objects around us. BSc and object when light falls on it and gets reflected from its surface and enters are eyes. in a dark room there is no source of light. thus no light falls on the surface objects and hands we do not see them. this is why we can't see objects in a dark room.

Sound waves propagate through air without the air itself moving significantly. When an object vibrates, it disturbs nearby air particles, causing them to compress and vibrate, transferring energy to adjacent particles, creating regions of compression and rarefaction that produce sound. We cannot see objects in a dark room because light is necessary for visibility; without a light source, no light reflects off objects and enters our eyes, making them invisible in the darkness.