What is a plane wave function?
Michael Gray
Updated on April 02, 2026
The plane wave function (1.58) is also an eigenfunction of the kinetic energy operator, with eigenvalue E = p 2 ∕ 2 m . Thus, E = p 2 ∕ 2 m is the eigenvalue of the free particle Hamiltonian Ĥ Ĥ = p ^ 2 ∕ 2 m , and the plane wave (1.58) is the eigenfunction of the free particle Hamiltonian.
What are the characteristics of plane wave?
Plane waves are a special case of waves where a physical quantity, such as phase, is constant over a plane that is perpendicular to the direction of wave travel. Just like periodic waves, plane waves have a wavelength, frequency, and wave speed.
What is an example of a plane wave?
For example, the phase velocity of light is defined for plane waves. Fourier optics is an area of optics where light beams and other light waves are essentially decomposed into plane waves, using spatial Fourier transforms.
Why are plane waves called plane waves?
A plane wave is a constant-frequency wave whose wavefronts (surfaces of constant phase) are infinite parallel planes of constant peak-to-peak amplitude normal to the phase velocity vector. It is not possible in practice to have a true plane wave; only a plane wave of infinite extent will propagate as a plane wave.
What is the importance of uniform plane waves in electromagnetic?
The concept of uniform plane waves is important for electromagnetic wave propagation, scattering, and radiation. Uniform plane waves are composed of electric and magnetic field vectors whose directions are perpendicular to the wave propagation direction.
What is the phase of a plane wave?
A plane wave is a constant-frequency wave whose wavefronts (surfaces of constant phase ) are infinite parallel planes of constant peak-to-peak amplitude normal to the phase velocity vector.
What causes a plane wave?
Spherical waves can combine to form plane waves. A plane wave impinging on a surface will produce a reflected plane wave because all the spherical wavelets interfere constructively along a flat surface.
What is the difference between spherical and plane wave?
The basic difference between plane wave and spherical wave is that in plane wave disturbances propagated in single direction like string wave, while in spherical waves disturbances propagated outward in all directions from the source of wave. Light waves is an example of spherical wave.
What is wave function in quantum physics?
A wave function in quantum physics is a mathematical description of the quantum state of an isolated quantum system. The wave function is a complex-valued probability amplitude, and the probabilities for the possible results of measurements made on the system can be derived from it.
What is a planar wave?
Making sound creates a sound wave (there, air is moving). There are two main categories of waves: planar waves and spherical waves . An example of a spherical wave can be the wave created by a stone thrown in the center of a pool, while a planar wave would be a wave travelling inside a tube.
What is the function of the inclined plane?
inclined plane. (ĭn’klīnd’) A plane surface, such as a ramp or a blade, set at an acute angle to a horizontal surface, a direction of motion, or a direction of force. Inclined planes are used to increase the distance over which work is done, reducing the amount of force needed to impart energy to a system.
What is a plane wave front?
The shows a spherical wave front (ws) for a sound wave spreading out from a point source and a plane wave front (wp) for a parallel beam of light, such as that emitted from a laser. Wave fronts for longitudinal and transverse waves may be surfaces of any configuration depending on the source, the medium, and the obstructions encountered.