WE have recently been investigating the far ultra-violet absorption spectra of a number of organic compounds of the type R 1 COOR 2; R being an alkyl group or a hydrogen atom. It has been found ...

IT is well known that the study of the absorption spectrum of elements provides us with the simplest method of determining the normal states of atoms. In the hands of Wood, Bevan, McLennan ...

Although sunlight appears to be a full continuous spectrum when viewed with a spectroscope, more detailed observation shows black narrow lines. These 'Fraunhofer' lines are due to the absorption ...