Which Joe gave his name to ‘sloppy joes’? We look at five interesting sandwiches and their lexical origins.
The speed at which the energy of a wave travels.
- ‘Essentially, the group velocity of the wave must fall to zero at that location, dropping in such a way that there is sufficient time for the damping to dissipate all of the wave's energy before it gets to that point.’
- ‘He counters that when a beam passes between positive- and negative-index media the group velocity is negatively refracted.’
- ‘Even when the phase velocity is faster than light, the group velocity should be slower.’
- ‘The group velocity dispersion induced by optical elements in the fluorescence path was measured using white light generated by 800-nm pulses in the same flow cell tilled with water.’
- ‘These numbers indicate a group velocity for these structures of approximately 1% of the speed of light in free space.’
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.