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Laser: A hard, accurate shot.

Laser Printer: A type of printer that is a combination of an electro-static copying machine and a printer. An electro-static charge is used to transfer toner onto the page, which is then fused onto the pap . . . View Full Definition

Laser Radar (LIDAR): Laser radar (lidar) is a radar that uses light in place of the radio-frequency signals used in conventional radar.

Thulium (Tm): Atomic number: 69, Atomic mass: 168.93 g.mol -1, Electronegativity: 1.2, Density: 9.3 g.cm-3 at 20°C, Melting point: 1545 °C, Boiling point: 1947 °C, Vanderwaals radius: unknown, Ionic radiu . . . View Full Definition

Terbium (Tb): Atomic number: 65, Atomic mass: 158.92534 g.mol -1, Electronegativity: 1.2, Density: 8.3 g.cm-3 at 20°C, Melting point: 1360 °C, Boiling point: 3041 °C, Vanderwaals radius: unknown, Ionic ra . . . View Full Definition

Neon (Ne): Atomic number: 10, Atomic mass: 20.179 g.mol -1, Electronegativity: unknown, Density: 0.9*10 -3 g.cm-3 at 20°C, Melting point: -249 °C, Boiling point: -246 °C, Vanderwaals radius: 0.16 nm, I . . . View Full Definition

Gallium (Ga): Atomic number: 31, Atomic mass: 69.72 g.mol -1, Electronegativity: unknown, Density: 5.1 g.cm-3 at 20°C, Melting point: 29.8 °C, Boiling point: 2204 °C, Vanderwaals radius: 0.161 nm, Ionic r . . . View Full Definition

Space Opera: A subgenre of 'soft' science fiction especially popular between 1930-1960, often used in a derogatory sense. These space operas are novels or short stories set in the distant future after hu . . . View Full Definition

Flow Cytometry: Analysis of biological material by detection of the light- absorbing or fluorescing properties of cells or subcellular fractions (i.e., chromosomes) passing in a narrow stream through a lase . . . View Full Definition

Coherent Light: Light waves that vibrate with constant phase relationships. They can be produced by a laser or a combination of two prisms.