Applied Physics I: Chapter 4: Oscillations and Waves
Travelling (or) Progressive waves and standing (or) stationary waves
Travelling (or) Progressive waves and standing (or) stationary waves
TRAVELLING (OR)
PROGRESSIVE WAVES AND STANDING (OR) STATIONARY WAVES
Progressive waves
In
a travelling wave (or) progressive wave,
the energy is transferred from one place to another by the continuous vibration
of the particles in an elastic material medium about their equilibrium
position.
In
a travelling wave every point vibrates with same amplitude and the phase of
vibration changes for different points along its path.
Examples
1)
Waves passing through water.
2)
Electromagnetic waves in which the electric and magnetic fields vary
periodically at right angles to each other and to the direction of propagation.
Stationary waves
When
two identical progressive waves travel through a medium along the same line in
opposite directions with equal velocities, they superimpose over each other and
produces a new type of wave called as Standing
wave (or) stationary wave.
They
are called stationary waves because there is no flow of energy along the waves.
In a stationary wave the points at which the displacement is zero are called nodes. The points at which the
displacement maximum are called antinodes.
In a stationary wave all the points between successive nodes will be in phase.
Examples
1)
Waves along a string.
2)
Waves along the air‒column of a pipe.
DIFFERENCES BETWEEN TRAVELLING WAVES & STANDING WAVES
Applied Physics I: Chapter 4: Oscillations and Waves : Tag: Applied Physics : - Travelling (or) Progressive waves and standing (or) stationary waves
Applied Physics I: Chapter 4: Oscillations and Waves
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