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2. Illumination problem - Wikipedia

   en.wikipedia.org/wiki/Illumination_problem

   In 1997, two different 24-sided rooms with the same properties were put forward by George Tokarsky and David Castro separately. [ 3 ] [ 4 ] In 2016, Samuel Lelièvre, Thierry Monteil, and Barak Weiss showed that a light source in a polygonal room whose angles (in degrees) are all rational numbers will illuminate the entire polygon, with the ...

3. Speed of light - Wikipedia

   en.wikipedia.org/wiki/Speed_of_Light

   A light-year is the distance light travels in one Julian year, around 9461 billion kilometres, 5879 billion miles, or 0.3066 parsecs. In round figures, a light year is nearly 10 trillion kilometres or nearly 6 trillion miles. Proxima Centauri, the closest star to Earth after the Sun, is around 4.2 light-years away. [89]

4. Light - Wikipedia

   en.wikipedia.org/wiki/Light

   [4] [5] In this sense, gamma rays, X-rays, microwaves and radio waves are also light. The primary properties of light are intensity, propagation direction, frequency or wavelength spectrum, and polarization. Its speed in vacuum, 299 792 458 m/s, is one of the fundamental constants of nature. [6]

5. Interactive Mathematics Program - Wikipedia

   en.wikipedia.org/wiki/Interactive_Mathematics...

   The Interactive Mathematics Program (IMP) is a four-year, problem-based mathematics curriculum for high schools. It was one of several curricula funded by the National Science Foundation and designed around the 1989 National Council of Teachers of Mathematics (NCTM) standards .

6. Optical engineering - Wikipedia

   en.wikipedia.org/wiki/Optical_engineering

   Optical engineering is the field of engineering encompassing the physical phenomena and technologies associated with the generation, transmission, manipulation, detection, and utilization of light. [2] Optical engineers use the science of optics to solve problems and to design and build devices that make light do something useful. [3]

7. NYT ‘Connections’ Hints and Answers Today, Wednesday, January 8

   www.aol.com/nyt-connections-hints-answers-today...

   4. These words are related to a particular genre of music (hint: they deal with "names" that are spelled a little differently). Related: 300 Trivia Questions and Answers to Jumpstart Your Fun Game ...