Browse Definitions :
Definition

reciprocal meter

The reciprocal meter is the standard unit of wave number for electromagnetic field s (EM fields). In terms of International Units ( SI ), the reciprocal meter is equal to m -1 . The wave number is the number of complete wave cycles that exist in a linear span of 1 meter (m).

At the speed of light in free space, 2.99792 x 10 8 m/s, the frequency f in hertz ( Hz ) is related to the wave number y in reciprocal meters (m -1 ) according to the following formula:

y = f / (2.99792 x 10 8 )

To cite a few examples, an EM wave at 300 megahertz (MHz) in free space has a wave number of almost exactly 1 m -1 . If the frequency is doubled to 600 MHz, the wave number also doubles, to 2 m -1 . If the frequency becomes 1/10 as great, that is, it is decreased to 30 MHz, then the wave number is reduced to 0.1 m -1 . As a point of reference, it is easy to remember that the wave number of a 300-MHz signal in free space is very close to 1 m -1 .

In general, if the speed of propagation in meters per second for a specific medium is given by c , then:

y = f / c

where y is in reciprocal meters, and f is in hertz.

In radio-frequency ( RF ) transmission lines such as coaxial cable s and waveguide s, the speed of propagation is less than 2.99792 x 10 8 m/s. This increases the wave number, although it has no effect on the frequency.

Also see frequency , electromagnetic field , meter , wavelength , and International System of Units ( SI ).

This was last updated in September 2005
SearchNetworking
  • network packet

    A network packet is a basic unit of data that's grouped together and transferred over a computer network, typically a ...

  • virtual network functions (VNFs)

    Virtual network functions (VNFs) are virtualized tasks formerly carried out by proprietary, dedicated hardware.

  • network functions virtualization (NFV)

    Network functions virtualization (NFV) is a network architecture model designed to virtualize network services that have ...

SearchSecurity
  • data breach

    A data breach is a cyber attack in which sensitive, confidential or otherwise protected data has been accessed or disclosed in an...

  • insider threat

    An insider threat is a category of risk posed by those who have access to an organization's physical or digital assets.

  • data compliance

    Data compliance is a process that identifies the applicable governance for data protection, security, storage and other ...

SearchCIO
  • data privacy (information privacy)

    Data privacy, also called information privacy, is an aspect of data protection that addresses the proper storage, access, ...

  • leadership skills

    Leadership skills are the strengths and abilities individuals demonstrate that help to oversee processes, guide initiatives and ...

  • data governance policy

    A data governance policy is a documented set of guidelines for ensuring that an organization's data and information assets are ...

SearchHRSoftware
SearchCustomerExperience
  • recommerce

    Recommerce is the selling of previously owned items through online marketplaces to buyers who reuse, recycle or resell them.

  • implementation

    Implementation is the execution or practice of a plan, a method or any design, idea, model, specification, standard or policy for...

  • first call resolution (FCR)

    First call resolution (FCR) is when customer service agents properly address a customer's needs the first time they call.

Close