Polar clock

0.12 sec.

a tube, containing a polarizing apparatus, turning on an axis parallel to that of the earth, and indicating the hour of the day on an hour circle, by being turned toward the plane of maximum polarization of the light of the sky, which is always 90° from the sun.

See also: Polar

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polar axis
polar bear
polar body
polar bond
polar cap
polar circle
Polar circles
Polar clock
polar coordinate
polar coordinate system
polar coordinates
Polar dial
Polar distance
Polar equation of a line
Polar forces

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