Emission is the ability of a substance to give off light, when it interacts with heat. Absorption is the opposite of emission, where energy, light or radiation is absorbed by the electrons of a particular...

Celsius and centigrade are different terms referring to the same temperature scale. Centigrade has be phased out and replaced to Celsius by the CGPM (Conference General des Poids et Measures) in 1948.

An ammeter is an instrument that is used to measure the currents in a circuit. A voltmeter is an instrument that is used to measure the voltage between two points in a circuit.

Incandescent light bulbs produce light by an electrical current heating up a tungsten wire filament inside a glass bulb. Fluorescent light bulbs heat up mercury vapor to produce light.

Pounds and Lbs are same thing that have the same meaning, just spelled differently; while Pounds is the unit of measurement, ‘lbs.’ is the abbreviation and the official notion used to indicate pounds.