Plancks

Plancks is the plural form of the surname Planck and may refer to multiple individuals bearing that name. It is not a standalone scientific term, but rather appears in biographical, genealogical, or historical contexts when listing people with the surname Planck. The capitalization follows standard proper-name usage.

The most prominent bearer is Max Planck (1858–1947), a German theoretical physicist who founded quantum theory. In 1900 he proposed that energy is emitted or absorbed in discrete units called quanta, introducing Planck's constant, h, which relates a photon's energy to its frequency (E = hν). His work on black-body radiation resolved inconsistencies in classical physics and laid the groundwork for quantum mechanics. He received the Nobel Prize in Physics in 1918 for his foundational contributions.

Concepts and units named after Planck include Planck's constant, Planck's law describing the spectral radiance of a black body, and the Planck units (Planck length, Planck time, Planck mass, Planck temperature), which define a natural set of physical units used in theoretical physics and cosmology.

In general usage, "Plancks" may appear when listing multiple individuals with the surname Planck, such as in genealogical records or biographical indices. Without additional context—such as a given name or field—the term does not uniquely identify a single person.