I never found anything about vacuum, instead of emptiest space, ether theory, gravity... there's not much definition about vacuum. I have some question about vacuum; Q1)Does vacuum have quantum/energy state? Q2)Does vacuum behave like waves? Q3)How to know distant between vacuums exactly? Q4)Is there anything more about vacuum properties? I found that if vacuum really behave like wave, there is really different to the way to understand and visualise physics phenomenon. At the first I tought I can find some new discovery, however, it seems to be fatal. At first it may fit some fenomena, the general relativity and Lorent contraction. What I assume is mass is due to the oscillating factor due to the wave, the more oscillating factor(fast or slow, damp or loose... I don't know how, it just philosophical ideas), the more the mass; when the mass move faster, the oscillating factor also increase. These also "applyable" to photon, however photon don't have mass. However, both mass and photon share same properties of this oscillating factor: both wavelenght decrease at higher magnitude of this oscillating factors. I also though that gravity can be visualise by wave like vacuum/space, but i have no idea what I am thinking about. Even for electromanetic, strong and weak force I had tried. Anyway, yet I still like to know about vacuum. Anyone who know about vacuum?