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  2. Spectrum (novel) - Wikipedia

    en.wikipedia.org/wiki/Spectrum_(novel)

    Spectrum is a science fiction novel by Russian writer Sergei Lukyanenko, taking place in the near future. Contact with aliens allowed humanity to travel between planets through portals. Contact with aliens allowed humanity to travel between planets through portals.

  3. Answers.com - Wikipedia

    en.wikipedia.org/wiki/Answers.com

    On July 2, 2006, Answers.com released a trivia game known as blufr. [citation needed] In November 2006, Answers.com acquired the question and answer site FAQ Farm. [6] Following the acquisition, the product was renamed WikiAnswers. [7] In the fall of 2009, Answers.com launched a revamped version of their website that fully integrated ...

  4. Brief Answers to the Big Questions - Wikipedia

    en.wikipedia.org/wiki/Brief_Answers_to_the_Big...

    Brief Answers to the Big Questions is a popular science book written by physicist Stephen Hawking, and published by Hodder & Stoughton (hardcover) and Bantam Books (paperback) on 16 October 2018. The book examines some of the universe 's greatest mysteries, and promotes the view that science is very important in helping to solve problems on ...

  5. Brāhmasphuṭasiddhānta - Wikipedia

    en.wikipedia.org/wiki/Brāhmasphuṭasiddhānta

    Brāhmasphuṭasiddhānta is one of the first books to provide concrete ideas on positive numbers, negative numbers, and zero. [4] For example, it notes that the sum of a positive number and a negative number is their difference or, if they are equal, zero; that subtracting a negative number is equivalent to adding a positive number; that the product of two negative numbers is positive.

  6. Full Spectrum - Wikipedia

    en.wikipedia.org/wiki/Full_Spectrum

    Full Spectrum is a series of five anthologies of fantasy and science fiction short stories published between 1988 and 1995 by Bantam Spectra.The first anthology was edited by Lou Aronica and Shawna McCarthy; the second by Aronica, McCarthy, Amy Stout, and Pat LoBrutto; the third and fourth by Aronica, Stout, and Betsy Mitchell; and the fifth by Jennifer Hershey, Tom Dupree, and Janna Silverstein.

  7. Opticks - Wikipedia

    en.wikipedia.org/wiki/Opticks

    Book III to the 1730 edition of Opticks containing queries 1 to 4. Newton originally considered to write four books, but he dropped the last book on action at a distance. [7] Instead he concluded Opticks a set of unanswered questions and positive assertions referred as queries in Book III. The first set of queries were brief, but the later ones ...

  8. Visible spectrum - Wikipedia

    en.wikipedia.org/wiki/Visible_spectrum

    Goethe argued that the continuous spectrum was a compound phenomenon. Where Newton narrowed the beam of light to isolate the phenomenon, Goethe observed that a wider aperture produces not a spectrum but rather reddish-yellow and blue-cyan edges with white between them. The spectrum appears only when these edges are close enough to overlap.

  9. Frequency-hopping spread spectrum - Wikipedia

    en.wikipedia.org/wiki/Frequency-hopping_spread...

    Frequency-hopping spread spectrum (FHSS) is a method of transmitting radio signals by rapidly changing the carrier frequency among many frequencies occupying a large spectral band. The changes are controlled by a code known to both transmitter and receiver .