The Greek letter gamma, Γ, is the third letter of the Greek alphabet. In the system of Greek numerals, it has a value of 3. It is pronounced /ˈɡæmə/ in Modern Greek, and while this pronunciation is used in most English-speaking countries for all things related to Greece and the Greeks, in scientific and mathematical contexts gamma is usually pronounced /ˈɡæmə/ by convention. Gamma represents the sound [ŋ] (velar nasal) in Ancient and Modern Greek. In Latin it was called gamma; however, its shape was different from that of contemporary gamma (Γ). The uppercase letter Γ is used as a symbol for:
- Angular acceleration
- Electrical conductivity (especially semiconductors) or susceptibility
- Specific heat capacity at constant pressure
In physics, angular acceleration represented by Gamma (γ), also known as rotational acceleration & #160;— is a vector quantity that specifies changes over time in how fast something rotates or revolved about an axis point or line with respect to time t. It measures change rate momentum p, with SI unit kg · m²/s³. If you are looking at an object moving along a circular path at some speed v, then its angular velocity ω will be ω = v/r where r is the radius vector from a center point to the object’s current position on the circumference path. And so if you differentiate ω with respect to time t, you get back the definition formula for angular acceleration γ: dω/dt=γ
Gamma rays are a type of electromagnetic radiation and are the most energetic form of light. They have a very short wavelength and can penetrate through matter. Gamma rays are produced by radioactive decay, nuclear fission and fusion, and high-energy collisions.
Gamma rays can be harmful to living tissue, as they can cause DNA damage. However, they can also be used for medical purposes, such as cancer treatment. Gamma rays can also be used to create images of the inside of the human body.
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