Physical phenomena

fact that simply observing a situation or phenomenon necessarily changes that phenomenon

the point at which a sudden drop in air pressure occurs

dislocation of atoms in a solid caused by neutron radiation

phenomena of sand that produces sound

electrical phenomenon

in physics, single disturbance moving through a medium

thumb|300px|Schematic representation of a self-oscillation as a positive feedback loop. The oscillator V produces a feedback signal B. The controller at R uses this signal to modulate the external power S that acts on the oscillator. If the power is modulated in phase with the oscillator's velocity, a negative damping is established and the oscillation grows until limited by nonlinearities.

type of particle scattering which occurs at interfaces between a superconductor and a normal state material

physical phenomenon involving the scattering of low-energy electrons by atoms of a noble gas

optical phenomenon

type of cloud produced by large explosions in humid air

fact that toast usually falls butter-side down

measure of the energy loss of sound propagation in media; phenomenon when hearing protectors help reduce acoustic flux from flowing into the ears, is measured in decibels (dBs)

reduction in the polarisation of light caused by a magnetic field, named after Wilhelm Hanle

excitation of a quantum system via magnetism

forced-air flow inside a tunnel caused by moving vehicles

effect

Photophoresis denotes the phenomenon that small particles suspended in gas (aerosols) or liquids (hydrocolloids) start to migrate when illuminated by a sufficiently intense beam of light. The existence of this phenomenon is owed to a non-uniform distribution of temperature of an illuminated particle in a fluid medium. Separately from photophoresis, in a fluid mixture of different kinds of particles, the migration of some kinds of particles may be due to differences in their absorptions of thermal radiation and other thermal effects collectively known as thermophoresis. In laser photophoresis,

Applied electric field conductivity change

production of electric currents and charge separation during phase transition

decay of a neutron when outside a nucleus

Phenomenon Observed In Fluids

magnetic phenomenon

Potential energy of a magnetised body in an external magnetic field

electromagnetic property induced by some exotic optical materials