why sound needs a medium to travel

Sound Needs a Medium to Travel - The origin of sound is always some vibrating body. In some cases the vibrations of the source may be very small or very large that it may not be possible to detect them. This type of vibrations is produced by tuning ..

Sound can propagate not only through gases but also through solids and liquids. Some materials like air, water, iron etc can easily transmit sound energy from one place to anothe..

Sound - Sound is always produced due to the vibration of a body. In some cases the vibrations of the source may be very small or very large that it may not be possible to detect them. This type of vibrations is produced by tuning fork, drum, bell, the string of a guitar etc. Hum..

Sound is always produced due to the vibration of a body. In some cases the vibrations of the source may be very small or very large that it may not be possible to detect them. This type of vibrations is produced by tuning fork, drum, bell, the string of a guitar etc. Human voice ori..

Sound as a Wave - A ringing bell, a thunderclap, laughter, and rock music are sounds that seem very different to us. However, all sounds are alike because they are waves. Let us understand how wave properties can be applied to sound. Sound is the fo..

The intensity and hence, the loudness increases with the density of the medium in which sound travels. It has been observed that more effort is to be made to make oneself heard by another in aeroplanes or balloons, while flying at high altitudes as the density of air ..

Ordinarily, we hear sound, transmitted through the air. Unlike light, sound cannot pass through vacuum. This was discovered in 1654 by Otto Von Guericke. Let an electric bell be enclosed within a bell jar which is placed over a disc. Through a hole in the disc, air can be remov..

The flash of lightning due to collision of clouds is seen much before the thunder, although both occur simultaneously. This happens because the velocity of light is greater than the velocity of sound. The speed of sound depends on the properties of the medium throug..

We know that water transmits sound. This can be shown by clapping two pieces of stone or metal against each other under water, when the sound of the clapping can be heard above the water. In 1654, Otto Von Guericke found that fish were attracted by the sound of a ring..

Putting w = 0, in equation (1-38), we get If b < a, then (v - b) > (v - a) and f l > f. If b > a, then (v - b) < (v - a) and f l < f. If b = a, then f l = f. Thus, for a passenger sitting in a train the frequency of the whistle of the train appears to be the same, when..