Important find:when is the light wave-motion ?and when is particle-motion?

Important find:when is the light wave-motion ?and when is particle-motion?

I think that physics generally known as light has wave-particle duality being very ambiguous,can you strict distinguish when the light is wave-motion and when is particle-motion?
I think it must be:
(1)All nature light has not wave-motion but only has particle-motion,it moves in particle but not propagation by wave;
(2)The wave-motion of light only produce after the light "collide with" slits,no narrow-stitch will no wave-motion of light.So wave-motion is not the nature possessionlety of light.But when existing a nature slits,light behaving wave-motion,e.g. rainbow;
(3)Different monochromatic light has different speed,because contrast with below:
In electron diffraction experiment,diffraction pattern change by the changing of speed of electron.So that,if it does not pass through the slits,different monochromatic light could not be call "different frequency light",but only could be call"different speed light";
(4)Please do the experiment of " monochromatic light decelerate diffraction",you maybe could find the "frequency"of the monochromatic light can be changed!
Light series red shift is just only the deceleration of the light that come from remote star.
If it as above,many famous experiment in history would lost it's theory basis,e.g. Melde's experiment;and physics teaching-book must be modified in large scope!

xsz