Give reasons.
(a) A tabla player tightens or loosens the bands tying down the membrane.
(b) We hear thunder long after we have seen the flash of lightning.
(c) A surface is necessary for an echo to be heard.
Give reasons.
(a) A tabla player tightens or loosens the bands tying down the membrane.
(b) We hear thunder long after we have seen the flash of lightning.
(c) A surface is necessary for an echo to be heard.
(a) A tabla player wants to produce the sound of suitable frequency and it is done by adjusting the tension of the membrane of the tabla. Tension in the membrane is adjusted by tightening or loosening of the bands tied with it. Due to this reason, a tabla player tightens or loosens the bands tying down the membrane.
(b) We know that the speed of light is greater than that of sound. Due to this reason, we hear thunder long after we have seen the flash of lightning.
(c) Echo is a sound produced when the original sound undergoes reflection from a hard surface. For example, when you clap in a big hall, you first hear the original sound and then the reflected sound. This reflected sound is an echo of the original sound. Due to this reason, a surface is necessary for an echo to be heard.
(a) A tabla player wants to produce the sound of suitable frequency and it is done by adjusting the tension of the membrane of the tabla. Tension in the membrane is adjusted by tightening or loosening of the bands tied with it. Due to this reason, a tabla player tightens or loosens the bands tying down the membrane.
(b) We know that the speed of light is greater than that of sound. Due to this reason, we hear thunder long after we have seen the flash of lightning.
(c) Echo is a sound produced when the original sound undergoes reflection from a hard surface. For example, when you clap in a big hall, you first hear the original sound and then the reflected sound. This reflected sound is an echo of the original sound. Due to this reason, a surface is necessary for an echo to be heard.
