Introductory Guide to Emissivity

Sketch of the concept of spectral emissivity measurement
This is an introductory page on the National Physical Laboratory (NPL) website in the UK.

It has several such sketches as on the left showing the concept of the “radiometric method” of emissivity measurement and discusses both the concepts and measurement methods used to quantify spectral and total emissivity values.

The page also features links to other resource materials on the subject and a list of reference books.