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).
Examples of electromagnetic waves traveling through space independent of matter are radio and television waves, microwaves, infrared rays, visible light, ultraviolet light, X-rays, and gamma rays. All of these waves travel at the same speedânamely, the velocity of light (roughly 300,000 kilometres, or 186,000 miles, per second).