The term business cycle refers to economy-wide fluctuations in production, trade, and general economic activity. Identify features of the economic business cycle. Business cycles are identified as having four distinct phases: expansion, peak, contraction, and trough. An expansion is characterized by increasing employment, economic growth, and upward pressure on prices.
The speed of light in a given material is related to a quantity called the index of refraction, n, which is defined as the ratio of the speed of light in vacuum to the speed of light in the medium: index of refraction: n = c / v.When light travels from one medium to another, the speed changes, as does the wavelength.efraction. When we talk about the speed of light, we're usually talking about the speed of light in a vacuum, which is 3.00 x 10 8 m/s. When light travels through something else, such as glass, diamond, or plastic, it travels at a different speed.
The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is 7008299792458000000â 299,792,458 metres per second. It is exact because the unit of length, the metre, is defined from this constant and the international standard for time. According to special relativity, c is the maximum speed at which all conventional matter and hence all known forms of information in the universe can travel. Though this speed is most ...