The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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Click symbol for equation
kelvin-hertz relationship
 $(1 \ {\rm K})k/h$
 Numerical value  2.083 661 912...  x 1010 Hz
 Standard uncertainty  (exact)
  Relative standard uncertainty  (exact)
 Concise form  2.083 661 912... x 1010 Hz    
 
Click here for correlation coefficient of this constant with other constants
Source: 2022 CODATA     
recommended values 		 Definition of
uncertainty 		      Correlation coefficient with
any other constant

 
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