Units of Frequency
Description
Examples
Frequency has the dimension inverse time. The SI unit of frequency is the hertz, which is defined as an inverse second.
Maple knows the units of frequency listed in the following table.
Name
Symbols
Context
Alternate Spellings
Prefixes
hertz
Hz
SI *
SI
fresnel
f
standard *
fresnels
planck_frequency
planck *
planck_frequencies
An asterisk ( * ) indicates the default context, an at sign (@) indicates an abbreviation, and under the prefixes column, SI indicates that the unit takes all SI prefixes, IEC indicates that the unit takes IEC prefixes, and SI+ and SI- indicate that the unit takes only positive and negative SI prefixes, respectively. Refer to a unit in the Units package by indexing the name or symbol with the context, for example, hertz[SI] or f[standard]; or, if the context is indicated as the default, by using only the unit name or symbol, for example, hertz or f.
In some cases, it is desirable to represent hertz as revolutions per second. The default hertz can be changed to this new definition using the command Units:-AddUnit('hertz', 'context'='SI', 'conversion'=2*Pi*'rad'/'s', 'check'=false).
The units of frequency are defined as follows.
A hertz is defined as 1 per second.
A fresnel is defined as 1.×1012 hertz.
A planck frequency is defined as 1 per planck time.
convertHz,dimensions,base=true
1time
convert13.258,units,Hz,fresnel
1.325800000×10−11
Units:-AddUnithertz,context=SI,conversion=2πrads,check=false
convert52.25,units,Hz,degs
18810.00
See Also
convert/dimensions
convert/units
Units
Units/Index
Units/time
Units[AddUnit]
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