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## f

- frequencyFrequency is the number of repeated motions in a period of time. These motions can be up and down, like a hammer, or back(...) - Read More
- frequency and wavelengthFrequency and wavelength are both properties of waves. They are closely related, so this article discusses the two(...) - Read More
- functionThe term “function” is important in the field of quantum mechanics because is it the basis of the key term “wave function.”(...) - Read More
## i

- iThe letter i is the symbol for the square root of -1. In other words i = √-1. The symbol i often appears in the equations of(...) - Read More
- imaginary numberAn imaginary number is one that includes the square root of -1, written √(-1). While one might think that such a number(...) - Read More
- ionAn ion is formed when an atom gains or loses an electron. An atom which has lost one or more electrons has a positive(...) - Read More
- ionizeTo ionize is to convert a substance from atomic or molecular form to ions.
An ion is a type of atom that has an imbalance(...) - Read More

- isotopeIsotopes are a special kind of atom. Atoms with the same number of protons but different numbers of neutrons are isotopes of(...) - Read More
## j

- JouleA Joule is a unit for measuring energy. It's the amount of energy needed to lift a medium tomato one meter off the surface(...) - Read More
## l

- Law of Conservation of EnergyThe Law of Conservation of Energy says that the amount of energy in an isolated system remains constant. Energy cannot be(...) - Read More
- Law of Conservation of MatterThe Law of Conservation of Matter was abandoned as inaccurate by physicists early in the 1900’s. For more information, see(...) - Read More
- linear momentumLinear momentum is the oomph something has due to having mass that’s in motion. If a football player were to ram into a(...) - Read More
- lines of force“Lines of force” can best be explained with an illustration. The photo shows the lines of magnetic force created with a(...) - Read More
- logicalLogical reasoning is reasoning that draws conclusions based on correct understanding of relationships. Here are examples of(...) - Read More
## m

- magnetic momentThe magnetic moment is the strength of the response of a piece of metal to a magnetic field. It is a measure of the degree(...) - Read More
- magnetic moment of the electronThe magnetic moment of an electron is symbolized as g and is called the “g-factor.”
The magnetic moment is the degree to(...) - Read More

- mathematical constantPi and e are examples of mathematical constants. A mathematical constant has the same value no matter which mathematical(...) - Read More
- measurement in quantum mechanics(Also called “observation”). Measurement is of considerable consequence in the quantum world. At least in some(...) - Read More
- Measurement ProblemUnderstanding the Measurement Problem requires understanding the unique role of measurement in quantum mechanics. The entry(...) - Read More
- metalA metal is a kind of matter, usually derived from rocks found in nature. Examples of metals include iron, aluminum, and(...) - Read More