## IB Physics Glossary

Browse the glossary using this index

Special | A | B | C | D | E | F | G | H | I | J | K |

**L**| M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ALL

## L |
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## Law of Conservation of Charge states that the total charge of a closed system is constant. |

## Law of Conservation of Energystates, energy cannot be created or destroyed but is converted from one form into another or the total amount of energy in the universe is constant. | |

## Law of conservation of momentumstates, the total momentum of an system remains constant if no external forces act on the system. | |

## Lenz's law states the direction of the induced emf is such as to tend to oppose the change producing it. (s)
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## Light-year ly, is the distance traveled by light in one year in a vacuum or empty space. (d) | |

## Linear momentum is the product of mass and velocity, $$p= m v$$. (d) | |

## Log-log plots are used to find the value of the exponent $$n$$ and coefficient $$a$$ for the general relationship $$ y= a x^n$$. The value of the gradient for the log-log plot equals $$n$$ and $$a= log^{-1}{(\text{y-intercept})}$$. For example A linear relationship should have $$n \approx 1$$; A square-root relationship should have $$n \approx \frac{1}{2}$$; A quadratic relationship should have value $$n \approx 2$$; An inverse-square relationship should have value $$n \approx -2$$. | |

## LSBleast significant bit is the right-most or the trailing bit in a binary number. | |

## Luminosity is the power radiated or energy radiated per unit time by a star. (d) | |