Author or Editor: Stephen Hawking
Publisher: Transworld Publishers
Published: 2001
Pages: 210
Size: 26.5MB
Toward the end of the nineteenth century, scientists believed they were close to a complete description of the universe. They imagined that space was filled by a continuous medium called the "ether." Light rays and radio signals were waves in this ether, just as sound is pressure waves in air. All that was needed for a complete theory were careful measurements of the elastic properties of the ether.
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