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Keep Visiting TopStudyWorld.Com For Getting Great Marks in SSC, HSSC, and Entry Tests. 12 WAVE MOTION Q. What is wave? Write its importance in our daily life. Ans. “Wave is a mechanism in which energy is transferred from one place to another place due to disturbance in the medium”. Importance: There are some waves, which we can sce while there are some, which we cannot sce, but can. be detect with some sensitive instruments. 1- Sound reaches in our ears in the form of waves. 2. The sunlight and heat reaches us through waves. 3. The broad casting of radio and television is possible by waves. 4. The defects in human body e.g. broken bones, tumors, bullets can also be detected by waves. Q. What is wave motion? Explain. Ans. “Wave motion in a medium is due to generated disturbance which cause the constituent particles to repeat it’s to and fro motion about its mean position in equal interval of time, and this disturbance is passed over from one end of the medium to the other.” Explanation: Experiment-1: | ‘Take a tub of water and dip one end of a pencil at the edge of a tub, Move the pencil rapidly up and down vertically. The [ ripples emerge outward on the surface of water. Place some pieces of paper or cork equally spaced in the direction of waves and observe the movement of paper, we will see that every piece of paper move up and down about its mean ition. They are not displaced forward from their original position along with water waves pos ‘The pieces exhibit vibratory motion and have cons cutive vertical vibratory motion. Hence this disturbance is transferred along with the wave and visible water waves arc observed. Experiment-2: Take a string and mark it with different colours at equal intervals. Attach one end of string with a hook and keep the other end to oscillates. We will see that string will start oscillating vertically up and down briskly and wave will seen. When the colour markings are observed, the wave will travel down the string and they are vibrating about their mean position. At particular time it will observe that the markings are in different position along their vibratory path rather than vibrating together. 
