The spectral colors of the rainbow are caused by dispersive refraction. Newton established that refraction causes the dispersion of light into its constituent hues. He named seven colors, in symmetry with the seven distinct notes in the Western musical scale.t is the ratio of the speed of light in a vacuum (c) to the speed of light in this medium (v): n = c / v. The bending of a light as it crosses the boundary into a different medium is determined by its refractive index, or how much the light is slowed down in the new medium.
Brief Description. Opioids are a class of drugs that include the illegal drug heroin as well as powerful pain relievers available legally by prescription, such as oxycodone (OxyContinÂ®), hydrocodone (VicodinÂ®), codeine, morphine, fentanyl, and many others. These drugs are chemically related and interact with opioid receptors on nerve cells in the body and brain.
Percocet is a brand-name prescription narcotic within the opioid family used to alleviate pain. It combines Oxycodone with Acetaminophen, a common over-the-counter pain reliever. The Acetaminophen enhances the effectiveness of the Oxycodone, however, making it a powerful drug with a high risk of addiction.