光由甚麼組成

光是有波粒二象性的特性

如果你認為光是粒子的話:正負電子湮滅產生很多光子.

如果你認為光是波的話 :光是電磁波.


牛頓第二物理定律:

將某東西加速的力量等於東西重量乘加速度.

F=ma F=力量 Nm=重量 kg a=加速度 m/s^2





2011-12-01 14:08:56 補充：
F=ma

Light is electromagentic wave (電磁波). It composes of time varying electric and magentic fields. Hence, light propagates by mutual induction of electric and magentic fields in space.

Newton's Second Law of motion states that the rate of change of momentum is proportional to the force applied, and takes place in the direction at which the force acts.

In other words, the larger the applied force to an object, the higher the acceleration of the object will be.