Wave motion is the transfer of energy and momentum from one point of the medium to another point of the medium without actual transport of matter between two points. Production of sound sound is produced due to the vibration of objects. Longitudinal waves two different motions to describe in a wave. Wave motion is devoted to the cross fertilization of ideas, and to stimulating interaction between workers in various research areas in which wave propagation phenomena play a dominant role. Frequency of the wave f is the number of waves passing a given point in a unit of time. Waves a wave is a disturbance that pppg gropagates through space and time, usually with transferrance of energy. Wave, propagation of disturbances from place to place in a regular and organized way. Longitudinal waves when particles of the medium vibrate parallel to the. Notice, you are not being asked for the values of y1 nor y2. According to wave theory of light, the light is a form of energy which travels through a medium in the form of transverse wave motion. Notes on oscillations and mechanical waves periodic motion. Examples of wave motion include waves on strings, water waves, seismic waves. A sound wave traveling at 350 ms has a frequency of 500 hz.
In physics, motion is the phenomenon in which an object changes its position over time. Wave motion packet the document shown below can be downloaded and printed. Wavessuch as these water wavesspread outward from a source. Ncert solutions for class 11 physics chapter 15 waves. Based on the wave theory, poisson, aragoand fresnel predicted that there should be a. In transverse waves the particles of the medium move perpendicular to the direction in which the wave travels. Ncert cbse notes for class 9 science physics chapter 12 sound. Most familiar are surface waves on water, but both sound and light travel as wavelike disturbances, and the motion of all subatomic particles exhibits. Lecture 11 chapter 16 waves i university of virginia.
The understanding of physics of waves followed the physics of oscillations of masses tied to springs and physics of the simple pendulum. For example, a wave generated at 60 cycles per second has a frequency of 60 hz and can be expressed as 60s. These pressure disturbances move out into the surrounding air at approximately 330 meters per second i. How to develop effective study habits mar, 2020 pdf view jh sir physical chemistry notes for class 12 mar 8, 2020 pdf nv sir 11th class physics notes for jee and boards feb 27, 2020 pdf download nv sir physics notes complete for jee feb 22, 2020. Wave and motion grade 12 physics notes khullakitab. Phase velocity is the speed of the crests of the wave. Wave motion is classified into three different ways they are, the medium of propagation, the dimensions in which a wave propagates energy, the energy transfer. Charting pendulum motion the line drawn is sinusoidal, and can be described by the equation x acos.
Waves exam2 and problem solutions physics tutorials. Picture given below shows wave motion of source having frequency 2s1 a find wavelength b velocity c amplitude of wave. Grass grows, waves pound the sand, i beat people up. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time. Springs having different thicknesses are attached at point a.
Cengage physics pdf is a vital book in the world of physics physics, which should be read by every engineer and doctor. Part 2 wave motion and sound the general discussion of wave motion is important because the ideas of wave propagation are ubiquitous. So that particles can return to their mean position, after having been disturbed. A wave is the disturbance produce in the medium from an equilibrium condition which travels with the finite velocity in the region of space. Wave motion, propagation of disturbancesthat is, deviations from a state of rest or equilibriumfrom place to place in a regular and organized way. Motion of the waves energy motion of individual molecules of the wave transverse waves two motions are perpendicular waves on a string, water surface waves longitudinal waves two motions are parallel sound waves waves can have both transverse and longitudinal motion. Progressive harmonic wave phase and phase difference in wave motion jee mainsneet duration. Newton rejected the wave theory for good reason, but assumed the waves would be longitudinal like sound. All three types of wave motion can be set up in solids. We will start with periodic motion for the rst two lectures, with our speci c examples being the motion of a mass attached to the end of a spring, and the pendulum. Example a sinusoidal wave of frequency 500 hz has a speed of 350 ms. Illustrations on a printed page cannot do justice to this motion.
This note explains the physics of waves and oscillations including sound, elastic and electromagnetic waves. There is no sound in space theyll probably throw you out of the theater for causing a disturbance i. The motion of a body is observed by attaching a frame of reference to an observer and measuring the change in position of the body relative to that frame. Description of waves using functions of two variables. The particle in the water moves in a circular path as the wave goes by. The description and analysis of wave propagation phenomena provides a unifying thread connecting diverse areas. Brown physics textbooks introductory physics i and ii a lecture note style textbook series intended to support the teaching of introductory physics, with calculus, at a. In a longitudinal sound wave propagating in a gas, the vibrations are the displacements of the air molecules or pressure or density. Chapter 10 wave motion 343 would look like if our eyes were sensitive to very subtle pressure variationsfigure 10. Notes on oscillations and mechanical waves the topics for the second part of our physics class this quarter will be oscillations and waves. This wave will be moving with a phase velocity given by vphase. Some of the famous scientists associated with the physics of wave motion are christiaan huygens 16291695. Vibration is the rapid to and fro motion of an object. A wave is a disturbance which propagates energy and momentum from one place to the other without the transport of matter.
While a mechanical wave exists in a medium which on deformation is capable of producing elastic restoring forces waves ofproducing elastic restoring forces, waves of. The speed of light in a medium depends upon the nature of medium. In the simplest waves, the disturbance oscillates periodically see periodic motion with a fixed frequency and. Their formation is possible when two waves of same frequency travelling with. Pythagoras observed in 550 bce that vibrating strings produced sound, and worked to. The document covers class 12 physics notes on sound waves containing top concepts like wave motion, mechanical wave motion, progressive wave, superposition principle, stationary waves etc. Wave motion transfers energy from one point to another, which may or may not displace particles of the medium. The physics of waves version date february 15, 2015. In a longitudinal wave, the disturbance is parallel to the wave motion. The period t is the time for one wave to pass a given point.
Suppose the disturbance is created by simple harmonic motion at one point. Free pdf download of ncert solutions for class 11 physics chapter 15 waves solved by expert teachers as per ncert cbse textbook guidelines. Most familiar are surface waves that travel on water, but sound, light, and the motion of subatomic particles all exhibit wavelike properties. Ancient greek philosophers, many of whom were interested in music, hypothesized that there was a connection between waves and sound, and that vibrations, or disturbances, must be responsible for sounds. The book is targeted at the first year undergraduate science and engineering students.
Pdf download allen jee mains 2020 minor and major test papers with solutions apr 12, 2020. Much of our current understanding of wave motion has come from the study of acoustics. Wave optics describes the connection between waves and rays of light. A sinusoidal wave of frequency 500 hz has a speed of 350 ms. Pdf this undergraduate textbook on the physics of wave motion in optics and acoustics avoids presenting the topic abstractly in order to emphasize. A century later it was postulated that light could be a transverse wave. Teachers are granted permission to use them freely with their students and to use it as part of their curriculum. Waves on a string transverse waves can propagate on a string held taut with a tension force, f, in n.
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