# A report onWave interference

Phenomenon in which two waves combine by adding their displacement together at every single point in space and time, to form a resultant wave of greater, lower, or the same amplitude.

- Wave interference

## Double-slit experiment

Demonstration that light and matter can display characteristics of both classically defined waves and particles; moreover, it displays the fundamentally probabilistic nature of quantum mechanical phenomena.

Demonstration that light and matter can display characteristics of both classically defined waves and particles; moreover, it displays the fundamentally probabilistic nature of quantum mechanical phenomena.

Changes in the path-lengths of both waves result in a phase shift, creating an interference pattern.

## Coherence (physics)

In physics, two wave sources are coherent if their frequency and waveform are identical.

In physics, two wave sources are coherent if their frequency and waveform are identical.

Coherence is an ideal property of waves that enables stationary (i.e. temporally or spatially constant) interference.

## Interferometry

Interferometry is a technique which uses the interference of superimposed waves to extract information.

## Quantum mechanics

Fundamental theory in physics that provides a description of the physical properties of nature at the scale of atoms and subatomic particles.

Fundamental theory in physics that provides a description of the physical properties of nature at the scale of atoms and subatomic particles.

Another consequence of the mathematical rules of quantum mechanics is the phenomenon of quantum interference, which is often illustrated with the double-slit experiment.

## Wave

Propagating dynamic disturbance of one or more quantities.

Propagating dynamic disturbance of one or more quantities.

This phenomenon arises as a result of interference between two waves traveling in opposite directions.

## Wave–particle duality

Concept in quantum mechanics that every particle or quantum entity may be described as either a particle or a wave.

Concept in quantum mechanics that every particle or quantum entity may be described as either a particle or a wave.

The resulting Huygens–Fresnel principle was extremely successful at reproducing light's behaviour and was subsequently supported by Thomas Young's discovery of wave interference of light by his double-slit experiment in 1801.

## Michelson interferometer

Common configuration for optical interferometry and was invented by the 19/20th-century American physicist Albert Abraham Michelson.

Common configuration for optical interferometry and was invented by the 19/20th-century American physicist Albert Abraham Michelson.

The resulting interference pattern that is not directed back toward the source is typically directed to some type of photoelectric detector or camera.

## Wavelength

Spatial period of a periodic wave—the distance over which the wave's shape repeats.

Spatial period of a periodic wave—the distance over which the wave's shape repeats.

The term wavelength is also sometimes applied to modulated waves, and to the sinusoidal envelopes of modulated waves or waves formed by interference of several sinusoids.

## Mach–Zehnder interferometer

Device used to determine the relative phase shift variations between two collimated beams derived by splitting light from a single source.

Device used to determine the relative phase shift variations between two collimated beams derived by splitting light from a single source.

White light in particular requires the optical paths to be simultaneously equalized over all wavelengths, or no fringes will be visible (unless a monochromatic filter is used to isolate a single wavelength).