This electromagnetic radiation is at the precise frequency of 1420.40575177 MHz, which is equivalent to the vacuum wavelength of 21.10611405413 cm in free space.
Razlaga v obeh primerih temelji na predpostavki, da je topljenec prisoten samo v tekoči fazi in ne preide v plinsko fazo, razen pri izredno visokih temperaturah, se pravi da je nehlapen.