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[[Classical physics]] generally encompasses all areas of physics that were well-understood by the end of the 19th century (i.e., before the events that led to the advent of the theory of relativity and quantum mechanics). It is applicable to problems on an "everyday" scale; that is, situations in which energies are large enough to permit one to neglect quantum effects, but small enough to neglect relativistic effects. Areas of study within classical physics include
[[Classical physics]] generally encompasses all areas of physics that were well-understood by the end of the 19th century (i.e., before the events that led to the advent of the theory of relativity and quantum mechanics). It is applicable to problems on an "everyday" scale; that is, situations in which energies are large enough to permit one to neglect quantum effects, but small enough to neglect relativistic effects. Areas of study within classical physics include
*[[Mechanics]], the study of [[force|forces]] acting on bodies and the motion of them
*[[Mechanics]], the study of [[force]]s acting on bodies and the motion of them
*[[Thermodynamics]], the study of [[energy]], [[heat]], [[work]], [[entropy]] and its transformations
*[[Thermodynamics]], the study of [[energy]], [[heat]], [[work]], [[entropy]] and its transformations
*[[Electromagnetism]], the study of the electric and magnetic phenomena and [[light]]
*[[Electromagnetism]], the study of the electric and magnetic phenomena and [[light]]
Modern physics generally includes areas of study within physics that surfaced after 1900, the year in which [[Max Planck]] proposed a "quantum hypothesis" to explain the properties of light emitted by [[black body|hot, dark objects]]. The two major aspects of modern physics are
Modern physics generally includes areas of study within physics that surfaced after 1900, the year in which [[Max Planck]] proposed a "quantum hypothesis" to explain the properties of light emitted by [[black body|hot, dark objects]]. The two major aspects of modern physics are
*[[Relativity]], a new physical theory based on all observers in [[Inertial frame of reference|inertial frames of reference]] measure the same value for the [[speed of light]]. This lead to space and time not being absolute concepts
*[[Relativity]], a new physical theory based on all observers in [[Inertial frame of reference|inertial frames of reference]] measure the same value for the [[speed of light]]. This led to space and time not being absolute concepts
*[[Quantum mechanics]], a probabilistic description of the discrete behavior of [[matter]] and [[energy]] at tiny length and energy scales, such as this of [[subatomic particles]]
*[[Quantum mechanics]], a probabilistic description of the discrete behavior of [[matter]] and [[energy]] at tiny length and energy scales, such as this of [[subatomic particles]]
*Evidence suggests that the matter in the universe that humans can currently detect directly is only a fraction of the matter that actually exists. Attempts to discover the nature of the as-yet-undetectable [[dark matter]] are underway.
*Evidence suggests that the matter in the universe that humans can currently detect directly is only a fraction of the matter that actually exists. Attempts to discover the nature of the as-yet-undetectable [[dark matter]] are underway.
*The universe is known to be expanding at an accelerated rate. Such acceleration requires energy, but the form and source of this [[dark energy]] is not well-understood.
*The universe is known to be expanding at an accelerated rate. Such acceleration requires energy, but the form and source of this [[dark energy]] is not well-understood.
*General relativity predicts the existence of gravitational waves and their discovery was announced in early 2016<ref>https://www.ligo.caltech.edu/news/ligo20160615</ref>. Due to the weakness of the gravitational interaction, extremely sensitive detectors are required. The [[LIGO]] project is an example of current efforts to detect such waves.
*General relativity predicts the existence of gravitational waves and their discovery was announced in early 2016.<ref>https://www.ligo.caltech.edu/news/ligo20160615</ref> Due to the weakness of the gravitational interaction, extremely sensitive detectors are required. The [[LIGO]] project is an example of current efforts to detect such waves.
More applied areas of contemporany physical research include:
More applied areas of contemporany physical research include:
* Geophysics, the study of Earth processes from a physical point of view
* Geophysics, the study of Earth processes from a physical point of view
*[[Agrophysics]]
*[[Agrophysics]]
==References==
{{Reflist}}
==External links==
==External links==