Summary questions 1 a) Sketch an arrangement that may be used to observe the fringe
pattern when light from a narrow slit illuminated by a sodium vapour
lamp is passed through a double slit.
b) Describe the fringe pattern you would expect to observe in a.​

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell