Corona discharge with a discharge current of a few hundred microamperes can blow out a small candle flame within about 1 cm of a discharge point. A pinwheel, with radial metal spokes and pointed tips bent to point along the circumference of a circle, can be made to rotate if energized by a corona discharge; the rotation is due to differential electric attraction between the metal spokes and the space charge shield region that surrounds the tips. Corona discharge A corona discharge is an electrical discharge brought on by the ionization of a fluid such as air surrounding a conductor that is
Crown Point, Tobago lighthouse consist of a square metal tower with gallery and lantern high and has a focalheight of . It is powered by solar unit and emits an alternating group of four white flashing repeated every 20 seconds visible up to . Crown Point, Tobago Crown Point is a town in southwestern Tobago, Trinidad and Tobago. It contains the Arthur Napoleon Raymond Robinson International Airport which was formerly known as the Crown Point Airport. It is near Store Bay, Buccoo Reef, and Pigeon Point. The name component "Crown" does not derive from the English word "crown", but from the Englisch word