Gray (unit) Gray (unit) The gray (symbol: Gy) is a derived unit of ionizing radiation dose in the International System of Units (SI). It is defined as the absorption of one joule of radiation energy per kilogram of matter. It is used as a unit of the radiation quantity absorbed dose which measures the energy deposited in a unit mass at a certain position, and of the radiation quantity kerma, which is the amount of energy that is transferred from photons to electrons per unit mass at a certain position. The corresponding cgs unit to the gray is the rad (equivalent to
Scientific method and religion Scientific method and religion Some controversies exist over the relationship of scientific method to religion. For example, some dispute to what degree scientific method had its origins in Christian theism, or to what degree the scientific method as understood in the 21st century is compatible with religion. In the 18th century, the birth of the scientific method was largely credited to the work of Francis Bacon, Isaac Newton, and John Locke. Modern history suggests that much earlier figures such as Roger Bacon and Islamic scientists also played an important role in shaping the experimental method. Thomas Jefferson wrote "Bacon, Locke