Question

光为甚么会反射,折射,散射?

Answer 1

更新1:

仲有
天空为甚么是蓝色[email protected]@

折射其实可以谂成一个物体从空气入到水入面，因为密度唔同…物体既速度同方向会有所影响???? 折射是一个光学名词，指光从一种介质进入另一种具有不同折射率之介质，或者在同一种介质中折射率不同的部分运行时，由于波速的差异，使光的运行方向改变的现象。例如当一条木棒插在水里面时，单用肉眼看会以为木棒进入水中时折曲了，这是光进入水里面时，产生折射，才带来这种效果。
Reflection
refraction
diffraction and scattering are all properties of waves. The particle nature of light in terms of photons is NOT a suitable physical concept in explaining wave properties. The theory of light photons is more applicable in qunatum mechanical situations. Simply speaking
light is
in fact
electromagentic waves in nature. The travelling of light in a medium (including free space) is due to mutual interaction of electric and magic fields. The speed of light
and lots of its properties
are therefore depend very much on the electric and magic properties of the medium in which light travels. These electric and magentic properties determine the various wave properties of light. 仲有
天空为甚么是蓝色 This is due to scattering of sun light by fine dust particles (which is called aerosoles) in the air. When light rays incident onto a fine particle
the light ray will be "diverted" to all direction
this process is called scattering. Rayleight discovered that such scattering depends inversely as the 4th power of wavelength. Blue light
having wavelength shorter than other colour lights
undergoes more scattering than other colour lights. Thus the sky looks blue because of the scattered blue light. You may refer to the following web-page for more information: hyperphysics.phy-astr.gsu.edu/Hbase/atmos/blusky
其实物理上既定理有好多野都唔可以解释到。 不过折射其实可以谂成一个物体从空气入到水入面，因为密度唔同…物体既速度同方向会有所影响。