Changes

==Origin==

==Origin==

[https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English], from Anglo-French delaier, from de- + laier to leave, from lai-, [[present]] and [[future]] stem of lesser, laisser to leave, from [[Latin]] laxare to slacken, from laxus loose  

[https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English], from Anglo-French delaier, from de- + laier to leave, from lai-, [[present]] and [[future]] stem of lesser, laisser to leave, from [[Latin]] laxare to slacken, from laxus loose  

*[http://en.wikipedia.org/wiki/14th_century 14th Century]

*[https://en.wikipedia.org/wiki/14th_century 14th Century]

==Definitions==

==Definitions==

*1: put off, postpone <delay a departure>

*1: put off, postpone <delay a departure>

Propagation '''delay''' is a technical term that can have a [[different]] [[meaning]] depending on the [[context]]. It can relate to networking, electronics or [[physics]]. In general it is the length of time taken for the [[quantity]] of interest to reach its destination.

Propagation '''delay''' is a technical term that can have a [[different]] [[meaning]] depending on the [[context]]. It can relate to networking, electronics or [[physics]]. In general it is the length of time taken for the [[quantity]] of interest to reach its destination.

==Networking==

==Networking==

In [http://en.wikipedia.org/wiki/Computer_network computer networks], propagation delay is the amount of time it takes for the head of the [[signal]] to travel from the sender to the receiver over a [[medium]]. It can be computed as the [[ratio]] between the link length and the propagation [[speed]] over the specific medium.

In [https://en.wikipedia.org/wiki/Computer_network computer networks], propagation delay is the amount of time it takes for the head of the [[signal]] to travel from the sender to the receiver over a [[medium]]. It can be computed as the [[ratio]] between the link length and the propagation [[speed]] over the specific medium.

Propagation delay = d/s where d is the distance and s is the [http://en.wikipedia.org/wiki/Wave_propagation_speed wave propagation speed]. In wireless communication, s=c, i.e. the [[speed of light]]. In copper wires, the speed s is typically about 67% av of speed of light. This delay is the major obstacle in the [[development]] of high-speed computers and called [http://en.wikipedia.org/wiki/Interconnect_bottleneck interconnect bottleneck] in IC systems.

Propagation delay = d/s where d is the distance and s is the [https://en.wikipedia.org/wiki/Wave_propagation_speed wave propagation speed]. In wireless communication, s=c, i.e. the [[speed of light]]. In copper wires, the speed s is typically about 67% av of speed of light. This delay is the major obstacle in the [[development]] of high-speed computers and called [https://en.wikipedia.org/wiki/Interconnect_bottleneck interconnect bottleneck] in IC systems.

==Physics==

==Physics==

In [[physics]], particularly in the [[electromagnetism]] field, the propagation delay is the length of time it takes for a [[signal]] to [[travel]] to its destination. For example, in the case of an electric signal, it is the time taken for the signal to travel through a wire. See also, [http://en.wikipedia.org/wiki/Velocity_of_propagation velocity of propagation].[http://en.wikipedia.org/wiki/Propagation_delay]

In [[physics]], particularly in the [[electromagnetism]] field, the propagation delay is the length of time it takes for a [[signal]] to [[travel]] to its destination. For example, in the case of an electric signal, it is the time taken for the signal to travel through a wire. See also, [https://en.wikipedia.org/wiki/Velocity_of_propagation velocity of propagation].[https://en.wikipedia.org/wiki/Propagation_delay]

[[Category: Physics]]

[[Category: Physics]]