As nouns the difference between ratiometry and radiometry
is that ratiometry is measurement involving a ratio, as by a ratiometer while radiometry is the branch of science that deals with the detection and measurement of radiant electromagnetic energy.
ratiometry
English
Noun
(-)
measurement involving a ratio, as by a ratiometer radiometry
English
Noun
(
wikipedia radiometry)
(
-)
(physics) The branch of science that deals with the detection and measurement of radiant electromagnetic energy.