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2. Infrared - Wikipedia

   en.wikipedia.org/wiki/Infrared

   A false-color image of two people taken in long-wavelength infrared (body-temperature thermal) radiation. This pseudocolor infrared space telescope image has blue, green, and red corresponding to wavelengths of 3.4, 4.6, and 12 μm, respectively. Infrared ( IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths ...

3. Light - Wikipedia

   en.wikipedia.org/wiki/Light

   Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. [1] Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz. The visible band sits adjacent to the infrared ...

4. Snow White and the Seven Dwarfs (1937 film) - Wikipedia

   en.wikipedia.org/wiki/Snow_White_and_the_Seven...

   Snow White and the Seven Dwarfs is a 1937 American animated musical fantasy film produced by Walt Disney Productions and released by RKO Radio Pictures.Based on the 1812 German fairy tale by the Brothers Grimm, the production was supervised by David Hand, and was directed by a team of sequence directors, including Perce Pearce, William Cottrell, Larry Morey, Wilfred Jackson, and Ben Sharpsteen.

5. The Mirror and the Light - Wikipedia

   en.wikipedia.org/wiki/The_Mirror_and_the_Light

   The Mirror & The Light is a historical novel by the English writer Hilary Mantel.Following Wolf Hall (2009) and Bring Up the Bodies (2012), it is the final instalment in her trilogy charting the rise and fall of Thomas Cromwell, minister in the court of King Henry VIII, covering the last four years of his life, from 1536 until his death by execution in 1540.

6. Nonimaging optics - Wikipedia

   en.wikipedia.org/wiki/Nonimaging_optics

   Nonimaging optics (also called anidolic optics) is a branch of optics that is concerned with the optimal transfer of light radiation between a source and a target. Unlike traditional imaging optics, the techniques involved do not attempt to form an image of the source; instead an optimized optical system for optimal radiative transfer from a source to a target is desired.

7. Focus (optics) - Wikipedia

   en.wikipedia.org/wiki/Focus_(optics)

   For a lens, or a spherical or parabolic mirror, it is a point onto which collimated light parallel to the axis is focused. Since light can pass through a lens in either direction, a lens has two focal points – one on each side. The distance in air from the lens or mirror's principal plane to the focus is called the focal length.