All around us: wheels, skaters, ballet, gymnasts, helicopter, rotors, mobile engines, CD disks, … Atomic world: electrons— “spin”, “orbit”. Universe: planets spin and orbiting the sun, galaxies spin, …

The causes of acceleration of a system--The first law of motion states that zero total force exists when the system has a constant velocity; a nonzero total force on the system causes its acceleration

The gravitational force 2. Newtons law of universal gravitation

Chapter 13 temperature, heat transfer, and first law of thermodynamics Thermodynamics study the thermal energy (often 10\ -Universe just after beginning called the internal energy) of systems

1. The position vector and displacement Let the plane of the two-dimensional motion be the x-y plane of a Cartesian coordinate system

1. The discovery of electrification OThe phenomenon of electrification Glass rod is rubbed with silk-positive Amber rod is rubbed with fur--negative

Electric Fields 918.1 Conductors in electric field 1. Conductors A conductor is a material in which the electrons at the outer periphery of an atom have no great affinity for any particular individual

Electrical Potential Ener and Electric Potentia 17.1 Electrical potential energy and electric potential 1. Electric force is conservative force Coulomb's force:

中央明纹集中大部分能量,明条纹级次越高亮度越弱

一、光波的相干叠加 1.光波叠加原理 2.光的相干叠加 3.光程、光程差 4.从普通光源获得相干光