Which Joe gave his name to ‘sloppy joes’? We look at five interesting sandwiches and their lexical origins.
A rule which describes whether particular quantum transitions in an atom or molecule are allowed or forbidden.
- ‘Because the selection rules for one- and two-photon transitions differ, it is possible that 2PE can occur at energies where no corresponding one-photon absorption exists.’
- ‘There are simple selection rules that usually work in spectroscopy, corresponding to the known properties of atoms.’
- ‘This issue is related to the inhibition of carrier relaxation due to the selection rule of interaction between electrons and phonons in discrete energy level systems.’
Are you looking for a word for a foolish person? We explore twelve interesting words to describe the dunderheads in your life.
Before you run for the hills, let’s run through a list of ‘run’ expressions that are running through our minds.
The definitions of ‘buddy’ and ‘bro’ in the OED have recently been revised. We explore their history and increase in popularity.