The colors of visible light, often referred to as ROY G BIV (for red, orange, yellow, green, blue, indigo, and violet), are a small portion of the entire electromagnetic spectrum. Light can be thought of as a stream of packets of energy called photons.
The United States has a mixed economy and has maintained a stable overall GDP growth rate, a moderate unemployment rate, and high levels of research and capital investment. Its seven largest trading partners are Canada, China, Mexico, Japan, Germany, South Korea, and the United Kingdom.
Booming Agriculture. The agriculture sector of the United States economy grew far more rapidly than any other sector in 2013, and outperformed all but one sector over the last 15 years. It remains a small part of the overall economy, but its share is the largest it has been in at least the last 16 years.