送交者: 方舟子 于 2006-1-28, 05:13:56:
回答: 那是你不会查。我这个外行都可以查到Y.T. Chen的许多论文 由 方舟子 于 2006-1-28, 05:09:08:
"gravitation." Encyclopædia Britannica. 2004.
Early in the 1970s an experiment by the American physicist Daniel R. Long seemed to show deviation from the inverse square law at a range of about 0.1 metre. Long compared the maximum attractions of two rings upon a test mass hung from the arm of a torsion balance. The maximum attraction of a ring occurs at a particular point on the axis and is determined by the mass and dimensions of the ring. If the ring is moved until the force on the test mass is greatest, the distance between the test mass and the ring is not needed. Two later experiments over the same range showed no deviation from the inverse square law. In one, conducted by the American physicist Riley Newman and his colleagues, a test mass hung on a torsion balance was moved around in a long hollow cylinder. The cylinder approximates a complete gravitational enclosure and, allowing for a small correction because it is open at the ends, the force on the test mass should not depend on its location within the cylinder. No deviation from the inverse square law was found. In the other experiment, performed in Cambridge, Eng., by Y.T. Chen and associates, the attractions of two solid cylinders of different mass were balanced against a cylinder with a third mass so that only the separations of the cylinders had to be known; it was not necessary to know the distances of any from a test mass. Again no deviation of more than one part in 104 from the inverse square law was found. Other somewhat less sensitive experiments at ranges up to one metre or so also have failed to establish any greater deviation.