A report on Standing wave and Optical cavity

Animation of a standing wave ( red ) created by the superposition of a left traveling ( blue ) and right traveling ( green ) wave
A glass nanoparticle is suspended in an optical cavity
Longitudinal standing wave
Types of two-mirror optical cavities, with mirrors of various curvatures, showing the radiation pattern inside each cavity.
Transient analysis of a damped traveling wave reflecting at a boundary
Stability diagram for a two-mirror cavity. Blue-shaded areas correspond to stable configurations.
Standing wave in stationary medium. The red dots represent the wave nodes.
Alignment of a folded cavity using an autocollimator
A standing wave (black) depicted as the sum of two propagating waves traveling in opposite directions (red and blue).
Electric force vector (E) and magnetic force vector (H) of a standing wave.
Standing waves in a string – the fundamental mode and the first 5 harmonics.
A standing wave on a circular membrane, an example of standing waves in two dimensions. This is the fundamental mode.
A higher harmonic standing wave on a disk with two nodal lines crossing at the center.

An optical cavity, resonating cavity or optical resonator is an arrangement of mirrors that forms a standing wave cavity resonator for light waves.

- Optical cavity

Standing waves are also observed in optical media such as optical waveguides and optical cavities.

- Standing wave
Animation of a standing wave ( red ) created by the superposition of a left traveling ( blue ) and right traveling ( green ) wave

2 related topics with Alpha

Overall

Increase of amplitude as damping decreases and frequency approaches resonant frequency of a driven damped simple harmonic oscillator.

Resonance

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Applied periodic force is equal or close to a natural frequency of the system on which it acts.

Applied periodic force is equal or close to a natural frequency of the system on which it acts.

Increase of amplitude as damping decreases and frequency approaches resonant frequency of a driven damped simple harmonic oscillator.
Pushing a person in a swing is a common example of resonance. The loaded swing, a pendulum, has a natural frequency of oscillation, its resonant frequency, and resists being pushed at a faster or slower rate.
An RLC series circuit
A mass on a spring has one natural frequency, as it has a single degree of freedom
A standing wave (in black), created when two waves moving from left and right meet and superimpose
Standing waves in a string – the fundamental mode and the first 5 harmonics.
School resonating mass experiment
Animation illustrating electrical resonance in a tuned circuit, consisting of a capacitor (C) and an inductor (L) connected together. Charge flows back and forth between the capacitor plates through the inductor. Energy oscillates back and forth between the capacitor's electric field (E) and the inductor's magnetic field (B).
NMR Magnet at HWB-NMR, Birmingham, UK. In its strong 21.2-tesla field, the proton resonance is at 900 MHz.
High and low Q factor
"Universal Resonance Curve", a symmetric approximation to the normalized response of a resonant circuit; abscissa values are deviation from center frequency, in units of center frequency divided by 2Q; ordinate is relative amplitude, and phase in cycles; dashed curves compare the range of responses of real two-pole circuits for a Q value of 5; for higher Q values, there is less deviation from the universal curve. Crosses mark the edges of the 3 dB bandwidth (gain 0.707, phase shift 45° or 0.125 cycle).

Creation of coherent light by optical resonance in a laser cavity

In many cases these systems have the potential to resonate at certain frequencies, forming standing waves with large-amplitude oscillations at fixed positions.

A standing wave in a rectangular cavity resonator

Resonator

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Device or system that exhibits resonance or resonant behavior.

Device or system that exhibits resonance or resonant behavior.

A standing wave in a rectangular cavity resonator
An illustration of the electric and magnetic field of one of the possible modes in a cavity resonator.
RF cavities in the linac of the Australian Synchrotron are used to accelerate and bunch beams of electrons; the linac is the tube passing through the middle of the cavity.
A sport motorcycle, equipped with exhaust resonator, designed for performance
A Dobro-style resonator guitar

The oppositely moving waves interfere with each other, and at its resonant frequencies reinforce each other to create a pattern of standing waves in the resonator.

Thus an optical cavity, also known as a resonator, is a cavity with walls that reflect electromagnetic waves (i.e. light).