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  2. Fundamentals of Physics - Wikipedia

    en.wikipedia.org/wiki/Fundamentals_of_Physics

    The current version is a revised version of the original 1960 textbook Physics for Students of Science and Engineering by Halliday and Resnick, which was published in two parts (Part I containing Chapters 1-25 and covering mechanics and thermodynamics; Part II containing Chapters 26-48 and covering electromagnetism, optics, and introducing ...

  3. National Council of Educational Research and Training

    en.wikipedia.org/wiki/National_Council_of...

    Around 19 school boards from 14 states have adopted or adapted the books. [11] Those who wish to adopt the textbooks are required to send a request to NCERT, upon which soft copies of the books are received. The material is press-ready and may be printed by paying a 5% royalty, and by acknowledging NCERT. [11]

  4. Bohr–Sommerfeld model - Wikipedia

    en.wikipedia.org/wiki/Bohr–Sommerfeld_model

    Orbitals of the Radium. (End plates to [1]) 5 electrons with the same principal and auxiliary quantum numbers, orbiting in sync. ([2] page 364) The Sommerfeld extensions of the 1913 solar system Bohr model of the hydrogen atom showing the addition of elliptical orbits to explain spectral fine structure.

  5. Huygens–Fresnel principle - Wikipedia

    en.wikipedia.org/wiki/Huygens–Fresnel_principle

    Wave refraction in the manner of Huygens Wave diffraction in the manner of Huygens and Fresnel. The Huygens–Fresnel principle (named after Dutch physicist Christiaan Huygens and French physicist Augustin-Jean Fresnel) states that every point on a wavefront is itself the source of spherical wavelets, and the secondary wavelets emanating from different points mutually interfere. [1]

  6. Physical optics - Wikipedia

    en.wikipedia.org/wiki/Physical_optics

    Physical optics is also the name of an approximation commonly used in optics, electrical engineering and applied physics.In this context, it is an intermediate method between geometric optics, which ignores wave effects, and full wave electromagnetism, which is a precise theory.

  7. Coffee prices rise to nearly 50-year high due to weather ...

    www.aol.com/news/coffee-prices-rise-nearly-50...

    Coffee beans are hitting record high prices not seen in nearly 50 years after difficult growing seasons among some of the world's top producing regions. Earlier this week, the Wall Street Journal ...

  8. Lloyd's mirror - Wikipedia

    en.wikipedia.org/wiki/Lloyd's_mirror

    Lloyd's mirror is an optics experiment that was first described in 1834 by Humphrey Lloyd in the Transactions of the Royal Irish Academy. [1] Its original goal was to provide further evidence for the wave nature of light, beyond those provided by Thomas Young and Augustin-Jean Fresnel.

  9. The 34 best gifts for dog lovers and their four-legged friends

    www.aol.com/lifestyle/best-gifts-dog-lovers...

    The story is recommended for children ages 3 and up, and it’s sure to become a cherished part of their book collection. $30 at Uncommon Goods Etsy / YourWeddingPlace