HOW SOUND IS PROPAGATED? Sound is produced by vibrating objects. The matter or substance through which sound is transmitted is called a medium. It can be solid, liquid or gas. Sound moves through a
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SOUND NEEDS A MEDIUM TO TRAVEL Sound is a mechanical wave and needs a material medium like air, water, steel etc. for its propagation. It cannot travel through vacuum, which can be demonstrated by
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SOUNDWAVES ARE LONGITUDINAL WAVES Activity 12.4: * Take a slinky. Ask your friend to hold one end. You hold the other end. * Now stretch the slinky as shown in Fig. 12.7 (a). Then
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CHARACTERISTICS OF A SOUND WAVE We can describe a sound wave by its * Density/pressure * Wavelength and * speed Characteristics of sou
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SPEED OF SOUND IN DIFFERENT MEDIA Sound propagates through a medium at a finite speed. The sound of a thunder is heard a little later than the flash of light is seen. So, we can make o
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