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 Glossary
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| EDITORS: |
 InglesiAditya Vardhan Eni Generalic |
 FrancesiMichel Ditria |
 CroatoEni Generalic Marija Bralic Slobodan Brinic |
 TedescoMarc Hens |
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L |
Laminar flow | Lanthanides | Laser |
- Laminar flow
- Laminar flow is smooth, uniform, non-turbulent flow of a gas or liquid in parallel layers, with little mixing between layers. It is characterized by small values of the Reynolds number.
- Lanthanides
- Lanthanides (rare earth metals) is the fourteen elements of atomic number 57 through 71, which share common chemical properties: La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu. For all of these elements the filling orbital is 4f. This series is a sub-series of the transition metals.
- Laser
- Laser is a device in which an optical cavity is filled with a medium where a population inversion can be produced by some means. When the resonant frequency of the cavity bears the proper relation to the separation of the inverted energy levels, stimulated emission occurs, producing a highly monochromatic, coherent beam of light.
