Question

A switch in science is

Answer 1

Do any of these look right?

1:  a slender flexible whip, rod, or twig <a riding switch>2:  an act of switching: such asa :  a blow with a switchb :  a shift from one to anotherc :  a change from the usual <that outfit is a switch>3:  a tuft of long hairs at the end of the tail of an animal (as a cow) — see cow illustration4:  a device made usually of two movable rails and necessary connections and designed to turn a locomotive or train from one track to another5:  a device for making, breaking, or changing the connections in an electrical circuit6:  a heavy strand of hair used in addition to a person's own hair for some coiffures

Answer 2

Electrical switch - control consisting of a mechanical or electrical or Accelerator Laboratory scientists using SLAC's Linac Coherent Light Source hope this helps.