A wave is defined as the disturbance that traverses through a medium from one point to another. The waveform when stretched from one end to another, it remains in the rest position. If the particle is moved during its rest position, it forms a wave and starts moving from one point to another. The characteristics of the particle make it move either upwards or downwards, sometimes forwards or backwards. The movement of the wave in any direction is called the pulse.
A pulse is a single disturbance moving from one point to another point. If the wave is continuously moved back and forth, it causes a ripple in the medium and it is called as a Wave. In physics, there are two types of waves observed and analysed. One is the Stationary Wave and the other is the Travelling Wave. The difference between a stationary wave and a travelling wave is, the stationary wave does not transport any energy while travelling wave has the property of transporting energy from one location to another.
A stationary wave is that continuously oscillate in time but the peak amplitude does not move in space. In simpler words, a stationary wave is the one which moves vertically but not horizontally. A stationary wave has two waves which have constant wavelength and amplitude. These two waves travel in the opposite direction. While the waves are moving upward and downward nodes are formed. A node is a position where the wave stands for a particular period.
An antinode is the position of the wave when it oscillates or vibrates in the maximum amplitude. Stationary waves were observed by a scientist named Michael Faraday. The phenomenon is understood where the medium moves in the opposite direction to the wave.
The resulting interference causes the wave to remain stationary. Stationary wave does not transport any energy. Traveling and Standing Waves. This lesson has not been formatted as an ASA lesson plan. Define Amplitude in everyday language. Explain how the wave behaves as the Amplitude Use a slinky or giant spring on the floor.
Describe how you change the Amplitude of a transverse wave and a longitudinal wave on the spring or slinky. Repeat the above for Frequency, Tension and Damping. Place a blank piece of paper on your monitor and trace the wave as a continuous line and the wave generator.
Fill in circles over the green balls. Label your axes. This is a Vertical position- horizontal position graph. Press Play, and then Pause Use the same piece of paper, put it on the monitor and make sure to get the generator in the same spot. Trace the new wave and fill in over the green balls.
Describe how your picture changes and how the green balls change. You may have to do some more tests by pressing Play, then Pause and tracing to test your ideas. Try some other settings and explain why the above settings were recommended to create this graph. Measure the vertical location of a green ball with a ruler and record this position and the time.
Repeat the above procedure until you have 15 data points. Graph vertical position versus time using your data. Describe the differences and similarities between vertical position vs. Procedure — Materials and equipment: string, wave driver, function generator, weights, weight hanger, meter stick STEP 1 — Attach the string to the wave driver basically a speaker that vibrates a post as well as air and lay the other end of the string over the pulley. Which method is more accurate?
What are the sources of error? Be explicit. Indicate the nodes and antinodes. If this string is 2. What was the largest number of loops created in lab today? This interference leads to a very irregular and non-repeating motion of the medium. The appearance of an actual wave pattern is difficult to detect amidst the irregular motions of the individual particles. It is however possible to have a wave confined to a given space in a medium and still produce a regular wave pattern that is readily discernible amidst the motion of the medium.
For instance, if an elastic rope is held end-to-end and vibrated at just the right frequency , a wave pattern would be produced that assumes the shape of a sine wave and is seen to change over time.
The wave pattern is only produced when one end of the rope is vibrated at just the right frequency. When the proper frequency is used, the interference of the incident wave and the reflected wave occur in such a manner that there are specific points along the medium that appear to be standing still. Because the observed wave pattern is characterized by points that appear to be standing still, the pattern is often called a standing wave pattern.
There are other points along the medium whose displacement changes over time, but in a regular manner. These points vibrate back and forth from a positive displacement to a negative displacement; the vibrations occur at regular time intervals such that the motion of the medium is regular and repeating. A pattern is readily observable. The diagram at the right depicts a standing wave pattern in a medium. A snapshot of the medium over time is depicted using various colors.
Note that point A on the medium moves from a maximum positive to a maximum negative displacement over time. The diagram only shows one-half cycle of the motion of the standing wave pattern. The motion would continue and persist, with point A returning to the same maximum positive displacement and then continuing its back-and-forth vibration between the up to the down position.
Note that point B on the medium is a point that never moves. Point B is a point of no displacement.
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