social capital. Stock of community's goodwill and trust acquired by an organization over the years, through its understanding and addressing of the concerns and priorities of the citizens. See also social value.
All electromagnetic radiation travels at the same speed (in a vacuum). Electromagnetic radiation travels very quickly. There is nothing which can travel faster. The speed is 300,000,000 m/s in a vacuum (that is 300 million metres per second-not easy to imagine!). Electromagnetic radiation can be thought of as particles or waves (the word radiation is also used for radioactivity).
There is a better question, IMV, how do you prove em waves actually travel through a vacuum? After all, a photon moves at the speed of light relative to an observer so to a photon it doesn't travel through anything, it just is. Instantly. Alec Cawley, A very rusty first degree in Physics. But I have kept up with the subject at ...