One day in 1900, German physicist Max Planck told his son that he had made a breakthrough as important as Isaac Newton?s discovery of the workings of the universe. Planck had reached the surprising conclusion that light behaves as if it is packaged in discrete amounts, or quanta, a seemingly simple observation that would lead to a powerful new field of physics called quantum mechanics.

Encyclopaedia Britannica 2010 Ultimate Edition DVD. For Student and Home Use. When you need the facts, turn to the 2010 Britannica Ultimate Reference DVD for trusted information written by Nobel laureates, historians, curators, professors, and other noted authorities. From the youngest student to the curious adult to the most advanced researcher, users of every level will find what they need. Three age-appropriate encyclopedias; interactive tutorials in math, science, social studies, and other subjects; homework help; and other essential learning tools make it the most complete reference source available.

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