Phrase Hound found 51 phrases and 3 compound words that contain planck. The most common are listed below. Open planck in the live search for definitions, filters, and the full list.
Phrases 51
- Planck unitAny one of several natural units in a system originally proposed by Max Planck based on universal constants. Symbols for Planck units are the symbol for the physical quantity with a subscript P.
- Planck lengthA unit of length, believed to be the scale at which quantum gravity effects become significant, that is defined in terms of the speed of light, the gravitational constant and the reduced Planck's constant, namely: ℓ_P=√hbar Gc³≈1.616 …
- Planck timeA natural unit of time, equivalent to the time it takes light to traverse one Planck length; it is the duration of time at which quantum gravity effects are expected to become significant.
- Planck scaleThe scale at which quantum-mechanical effects become significant to depicting spacetime and other gravitational phenomena, typically defined as being on the order of one Planck length (~10⁻³⁵ m).
- Planck starA hypothetical astronomical object whose energy is around the Planck density (5.155 × 10⁹⁶ kg/m³).
- Planck constantAlternative form of Planck's constant: the constant of proportionality (symbol ℎ), relating the energy and frequency of a photon (6.626×10⁻³⁴ joule-second); also related to the indeterminacy limit in the Heisenberg uncertainty principle …
- Planck epochThe period immediately after the Big Bang, typically viewed at around one Planck time, whereby all forces were unified.
- Planck eraSynonym of Planck epoch: The period immediately after the Big Bang, typically viewed at around one Planck time, whereby all forces were unified.
- Planck accelerationThe acceleration from rest to the speed of light in one Planck time.
- Planck areaThe square of the Planck length, thought to be the quantum of area. Symbol is A'''_P.
- Planck chargeOne of the base units in the system of Planck units, equal to an electric charge of:q_p=√≈1.875×10⁻¹⁸ mbox C
- Planck currentAn electric current flowing at a rate of one Planck charge per Planck time: I_p=√≈3.479×10²⁵ mbox A.
- Planck densityThe unit of density in the system of Planck units, equal to one Planck mass in one Planck volume.
- Planck energyA natural unit of energy, equivalent to the mass energy of a Planck particle (E_P=c^(2m_P)≈1.95608×10⁹J) or the energy per quantum at a temperature of one Planck temperature (kT_P).
- Planck forceThe unit of force in the system of Planck units, equal to the amount of force required to accelerate one Planck mass by one Planck acceleration: F_P=(c⁴)/G≈1.21×10⁴⁴ mbox N
- Planck frequencyA repeating event that occurs once every Planck time, with a frequency of F_p=1/(2π)√=E_P/h≈2.952×10⁴² mbox Hz. this frequency is said to be the upper bound for the frequency of an electromagnetic ray or cosmic rays.
- Planck lengthsplural of Planck length: A unit of length, believed to be the scale at which quantum gravity effects become significant, that is defined in terms of the speed of light, the gravitational constant and the reduced Planck's constant, namely …
- Planck massThe unit of mass in the system of Planck units, defined as: m_P=√≈2.1765×10⁻⁸ mbox kg
- Planck momentumThe unit of momentum in the system of Planck units, defined as
- Planck particleA hypothetical particle having physical quantities on the Planck scale, most importantly being one Planck mass in mass.
- Planck powerThe unit of power in the system of Planck units, equal to transferring one Planck energy in one Planck time: P_p=(c⁵)/G≈3.628×10⁵² mbox W
- Planck pressureThe unit of pressure in the system of Planck units, equal to one Planck force in one Planck area (or one Planck energy in one Planck volume): p_p=(c⁷)/(hbar G²)≈4.633×10¹¹³ mbox Pa.
- Planck speedThe velocity equal to one Planck length per Planck time; equal to the speed of light. Symbol is v_P or c.
- Planck starsplural of Planck star: A hypothetical astronomical object whose energy is around the Planck density (5.155 × 10⁹⁶ kg/m³).
- Planck temperatureThe fundamental upper limit of temperature conceivable under current models of physics, in which all matter is accelerated as quickly as possible to the speed of light, approximately 1.41679 × 10³² kelvins.
Compound words 3
- PlanckianOf or pertaining to Max Planck (1858–1947), German physicist and founder of quantum theory.
- planckonA Planck particle.
- planckonsplural of planckon: A Planck particle.