Precise Determination of Separation Between Spherical Attracting Masses inMeasuring the Gravitational Constant

• 来源期刊: 中国物理快报（英文版）
• 学科: 物理学
• 年，卷（期）: 2001,（8）
• 页码范围: 1012-1014
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

A rotating gauge method is used to measure the span between two spheres with high precision in determination of the gravitational constant G. A rectangular gauge block slightly shorter than the span is located horizontally between two spheres, and the angle between two symmetric bounding points during rotation can be determined by measuring the shift of a laser beam passing through an optical plate fixed on the gauge block. Experimentalresults show that the uncertainty in the determination of the span between the two spheres is less than 0.5 μm.