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How does the light produced by a laser differ from that from sources? And what practical applications do lasers now have? Essentially, lasers possess two properties that no light sources have to the same extent First of all, the laser does not spew out its light in many directions as an electric light bulb does, but confines it to a narrow, intense, pencillike beam Secondly, the light itself is extremely pure or “coherent”—like sounding a single pure note on a musical instrument rather than many notes simultaneously Because of these special properties, lasers have found many applications in diverse fields. This was followed by two covenants: the International Covenant on Economic, and Cultural Rights, and the International Covenant on Civil and Political Rights The Universal Declaration was merely a statement of goals, and, hence, was signed by most of the then members of the United Nations The two covenants, however, were designed to make these goals into international law, binding on the signers The nations were much more hesitant about signing these.