Everything about Power Physics totally explained
In
physics,
power (symbol:
P) is the rate at which
work is performed or
energy is transmitted, or the amount of energy required or expended for a given unit of time. As a rate of change of work done or the energy of a subsystem, power is:
»
are equal. These ratios are called the
duty cycle of the pulse train.
Power in optics
optics, or
radiometry, the term
power sometimes refers to
radiant flux, the average rate of energy transport by electromagnetic radiation, measured in
watts. The term "power" is also, however, used to express the ability of a
lens or other optical device to
focus light. It is measured in
dioptres (inverse
metres), and equals the inverse of the
focal length of the optical device.
Further Information
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