Normal sparking from an electrical outlet. When that power is suddenly diverted to an appliance, there will be a quick draw on the available power, causing a brief spark. Once the electrons are flowing freely, there should be no reason for a spark to form.
Alfred Kastler (3 May 1902 â 7 January 1984) was a French physicist, and Nobel Prize laureate.
Collaborating with Jean Brossel, he researched quantum mechanics, the interaction between light and atoms, and spectroscopy. Kastler, working on combination of optical resonance and magnetic resonance, developed the technique of  optical pumping . Those works led to the completion of the theory of lasers and masers.