Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

57: Added definition for s (second) as per 9th Draft SI Brochure #168

Merged
merged 1 commit into from
Jan 27, 2019
Merged
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
10 changes: 10 additions & 0 deletions src/main/java/javax/measure/quantity/Time.java
Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,16 @@
/**
* Period of existence or persistence. The metric system unit for this quantity is "s" (second).
*
* The second, symbol s, is the SI unit of time. It is defined by taking the fixed
* numerical value of the caesium frequency ∆νCs, the unperturbed ground-state
* hyperfine transition frequency of the caesium 133 atom, to be 9 192 631 770 when
* expressed in the unit Hz, which is equal to s⁻¹.
*
* This definition implies the exact relation ∆νCs = 9 192 631 770 Hz. Inverting this relation
* gives an expression for the unit second in terms of the defining constant ∆νCs:
*
* 1 Hz = ∆νCs / 9 192 631 770 or 1 s = 9 192 631 770 / ∆νCs
*
* @author <a href="mailto:units@catmedia.us">Werner Keil</a>
* @version 1.6
* @since 1.0
Expand Down