matched pair compass is a magnet or magnetic needle
Answers
Explanation:
its a magnetic needle
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Explanation:
It's referred to as a compass needle, which floats suspended on a pinpoint so it can spin freely and align itself with Earth’s magnetic field lines. It's a tiny bar magnet with both north and south poles.
South pole tip at 60 degrees, ENE (east northeast). Gold-tipped north pole at 250 degrees, WSW (west southwest).
The magnetic compass was invented more than 2000 years ago, the first made of lodestone, in Han dynasty China between 300 and 200 BC. The south tip of a modern compass needle is painted with a color, red most commonly, some glow in the dark (above), having been painted with radium based radio-luminescent paint. Women factory workers painted pocket watch and compass faces, and because they contracted radiation poisoning were known as The Radium Girls. It didn’t help that they also painted their nails, face, and teeth, and were told to ‘point’ their brushes with a touch to the tongue. Old watches with radium will no longer glow in the dark, and radium has been replaced by phosphor.
The other end, the north end, with a non-descriptive dot of material for balance. It's the south tip that points north, the same principle as when two bar magnets are placed side-by-side, opposite poles being attracted to each other. With the compass held horizontally to the Earth, the needle spins freely, and aligns itself with the Earth's magnetic field lines pointing towards the Earth’s magnetic north pole. It will also tilt down, hence the counter-balance.
In the southern hemisphere, the needle will still point towards Earth's north pole, the colored tip still acting as the reference.
A compass will always point north, but that doesn't mean it will tell you where you are or in which direction to go to get where you want to be. A compass is used, or read, by aligning the markings on or in its case with a similarly matching emblem, called a rose, windrose, or Rose of the Winds, found on virtually all maps, pictured below. Their designs have been endless and unique throughout the centuries, traditionally considered a piece of art by map makers.