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Chapter 16

Waves

Движущиеся волны
Движущиеся волны
A wave is a disturbance that propagates from its source, repeating itself periodically, and is typically associated with simple harmonic motion. ...
Параметры волны
Параметры волны
The simplest mechanical waves are associated with simple harmonic motion and repeat themselves for several cycles. These simple harmonic waves can be ...
Уравнения волнового движения
Уравнения волнового движения
Mathematically, the motion of a wave can be studied using a wavefunction. Consider a string oscillating up and down in simple harmonic motion, having a ...
Построение графика волновой функции
Построение графика волновой функции
Consider the wave equation for a sinusoidal wave moving in the positive x-direction. The wave equation is a function of both position and time. From the ...
Скорость и ускорение волны
Скорость и ускорение волны
A wave propagates through a medium with a constant speed, known as a wave velocity. It is different from the speed of the particles of the medium, which ...
Скорость поперечной волны
Скорость поперечной волны
The speed of a wave depends on the characteristics of the medium. For example, in the case of a guitar, the strings vibrate to produce the sound. The ...
Решение проблем: Настройка гитарной струны
Решение проблем: Настройка гитарной струны
In the case of stringed instruments like the guitar, the elastic property that determines the speed of the sound produced is its linear mass density or ...
Кинетическая и потенциальная энергия волны
Кинетическая и потенциальная энергия волны
All forms of waves carry energy; this is directly visualized in nature. For instance, the waves of earthquakes are so intense that they can shake huge ...
Энергия и мощь волны
Энергия и мощь волны
The total energy associated with a wavelength is the sum of the potential energy and the kinetic energy. The average rate of energy transfer associated ...
Интерференция и наложение волн
Интерференция и наложение волн
When two waves of the same nature occur in the same region simultaneously, they result in interference. Interference of waves implies that the net effect ...
Отражение волн
Отражение волн
When a wave travels from one medium to another, it gets reflected at the boundary of the second medium. A common example of this is when a person yells at ...
Распространение волн
Распространение волн
When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second ...
Стоячие волны
Стоячие волны
Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a ...
Режимы стоячих волн - I
Режимы стоячих волн - I
A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. ...
Режимы стоячих волн: II
Режимы стоячих волн: II
The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions ...
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