Four sets of tees, large Penncross bentgrass greens protected by strategic bunkering and mounds, generous and gently rolling fairways, many elevation changes, lots of water and the ever-present wind combine to make Bretwood a favorite of recreational and competitive golfers alike.
The longer wavelengths (red) and the shorter wavelengths (blue) are separated. Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is visible to the human eye and is responsible for the sense of sight. Visible light is usually defined as having wavelengths in the range of 400â700 nanometres, or 4.00 Ã 10â7 to 7.00 Ã 10â7 m, between the infrared and the ultraviolet. This wavelength means a frequency range of roughly 430â750 terahertz. The main source of light on Earth is ...
Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 390 to 700 nm. In terms of frequency, this corresponds to a band in the vicinity of 430â770 THz.