This means an electrical pulse can pace both ventricles, resynchronising them.

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With each changing minute, an electrical pulse generates an electromagnetic field that changes the position of the crystals on the face of the watch, to elegantly display the passing time, while producing a distinctive sound unique to the Phosphor Reveal digital watch line.

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They detonate mines from 100-1, 000 metres away with the flash of a camera (sends a pulse down an electrical line).

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If used to detonate nuclear weapons in space over targeted nations, such missiles could unleash electro-magnetic pulse (EMP) attacks, resulting in widespread destruction of electrical grids and what a congressional commission has described as the "catastrophic" disruption of civilizations reliant upon them.

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Pulse-code modulation is simply a way of representing the analog electrical signal, in digital form.

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The EMP Threat Commission recommends steps be taken urgently to reduce that vulnerability by protecting electrical, water, telecommunications and other infrastructures against the crippling effects of electromagnetic pulse.

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That means that although the laser's electrical input is about the amount needed to run a bedside lamp, an individual pulse has an intensity of several million watts.

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Any electrical or electronic device - including the grid's transformers - not shielded against this pulse would be, at best, taken temporarily off-line.

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