The Electromagnetic Spectrum. The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes â the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two types of electromagnetic radiation.
Top definition. fathom. 1. a unit of mesuring distance that is 6 feet or about equal to the length of a grown man's outstreched arms. 2. to contemplate or think about with effort. 1.the shipwreck is about 10 fathoms down. 2.who but the almighty can fathom the depths of the abyss.
Fathom Cruises. Fathom is a new and entirely different kind of cruise vacation that combines your love of travel with your desire to make a difference. Pioneering a new category of cruise travel, Fathom voyages focus on building community and making a positive social impact in the world, while having fun. More About Fathom Cruises >.