Light corn syrup is used to rotate the plane of polarized light on the stage of an overhead projector. A polarizing filter allows only those photons with electric fields oscillating in a single plane ...
A special type of brushless motor is called a limited-angle torquer (LAT). LATs are constrained to produce torque through a rotation angle of less than 180°. But they are widely used to operate ...
CHARLES DRAPER, WHOSE EPONYMOUS LABORATORY developed the guidance systems for Apollo spacecraft, referred to inertial navigation as “astronomy in a closet.” It is based on a celestial reference system ...
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