Across
- 4. particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass.
- 8. throwing back by a body or surface of light, heat, or sound without absorbing it.
- 9. rate at which something occurs or is repeated over a particular period of time or in a given sample.
- 12. exterior angles-Formally, alternate exterior angles are defined as twoexterior angles on opposite sides of a transversal which lie on different parallel lines. Parallel lines cut. by a transversal.
- 13. light-of electromagnetic radiation) having a wavelength just greater than that of the red end of the visible light spectrum but less than that of microwaves. Infrared radiation has a wavelength from about 800 nm to 1 mm, and is emitted particularly by heated objects.
- 14. light-The definition of ultraviolet is relating to electromagnetic radiation with wavelengths shorter than visible light. An example of something ultravioletis "ultraviolet light" an electromagnetic radiation with a wavelength of up to 400 nanometers.
- 15. action or process of magnifying something or being magnified, especially visually.
Down
- 1. computer science, tree traversal (also known as tree search) is a form of graph traversal and refers to the process of visiting (checking and/or updating) each node in a tree data structure, exactly once. Suchtraversals are classified by the order in which the nodes are visited.
- 2. lens-A concave lens is any lens that has an inward curve in the middle. In other words, the edges of the lens are thicker than the middle. This causes light that enters the lens to spread out, or diverge. In effect, this makes images appear smaller when viewed through aconcave lens.
- 3. angles-the angles that occupy the same relative position at each intersection where a straight line crosses two others. If the two lines are parallel, the corresponding angles are equal.
- 5. device that generates an intense beam of coherent monochromatic light (or other electromagnetic radiation) by stimulated emission of photons from excited atoms or molecules. Lasers are used in drilling and cutting, alignment and guidance, and in surgery; the optical properties are exploited in holography, reading bar codes, and in recording and playing compact discs.
- 6. lens-a transparent optical device used to converge or diverge transmitted light and to form images. Aconvex lens bends light rays inward, which results in the object being perceived as larger or closer.
- 7. spectrum-Generally, electromagnetic radiation is classified by wavelength into radio wave, microwave, terahertz (or sub-millimeter) radiation, infrared, the visible region that is perceived as light, ultraviolet, X-rays and gamma rays.
- 10. fact or phenomenon of light, radio waves, etc., being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density.
- 11. distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.