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SAT2物理常用术语词汇整理(O)

来源:  日期:2014-01-20 16:26  阅读 151 次  作者:   划词  进入论坛  投稿

O

Optics
The study of the properties of visible light, i.e., the portion of the electromagnetic spectrum with wavelengths between 360 and 780 nm (1 nm = m/s).
Orbit
When an object is held in circular motion about a massive body, like a planet or a sun, due to the force of gravity, that object is said to be in orbit. Objects in orbit are in perpetual free fall, and so are therefore weightless.
Oscillation
A back-and-forth movement about an equilibrium position. Springs, pendulums, and other oscillators experience harmonic motion.

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