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Colour distribution of a Newton disk. The Newton disk, also known as the disappearing color disk, is a well-known physics experiment with a rotating disk with segments in different colors (usually Newton's primary colors: red, orange, yellow, green, blue, indigo, and violet, commonly known by the abbreviation ROYGBIV) appearing as white (or off-white or grey) when it's spun rapidly about its axis.
Thus the radius of the spurious disk of a faint star, where light of less than half the intensity of the central light makes no impression on the eye, is determined by [s = 1.17/a], whereas the radius of the spurious disk of a bright star, where light of 1/10 the intensity of the central light is sensible, is determined by [s = 1.97/a].
This limited edition reissue was released in a cardboard gatefold sleeve (mini LP-style paper jacket), featuring the "high-fidelity" SHM-CD manufacturing process (compatible with standard CD players) and was part of a two-album Rainbow cardboard sleeve reissue series featuring Rainbow Rising and Down to Earth. Both feature the unique-to-Japan ...
[1] [2] [3] AUS [4] CAN [5] FIN [6] GER [7] JPN [8] NOR [9] NLD [10] SWE [11] US [12] Ritchie Blackmore's Rainbow: Released: 5 September 1975 [13] Label: Oyster, Polydor; Formats: LP, MC, 8-track; 11 55 83 — — 26 10 — 24 30 UK: Silver [14] Rising: Released: 17 May 1976; Label: Oyster, Polydor; Formats: LP, MC, 8-track; 11 33 17 — 38 12 ...
The rainbow hologram (also known as Benton hologram) is a type of hologram that was invented in 1968 by Dr. Stephen A. Benton at Polaroid Corporation (later MIT). [1] Rainbow holograms are designed to be viewed under white light illumination, rather than laser light which was required before this.
A halo (from Ancient Greek ἅλως (hálōs) 'threshing floor, disk') [1] is an optical phenomenon produced by light (typically from the Sun or Moon) interacting with ice crystals suspended in the atmosphere. Halos can have many forms, ranging from colored or white rings to arcs and spots in the sky.
The white light source used to view these holograms should always approximate to a point source, i.e. a spot light or the sun. An extended source (e.g. a fluorescent lamp) will not reconstruct a hologram since its light is incident at each point at a wide range of angles, giving multiple reconstructions which will "wipe" one another out.
A fog bow, sometimes called a white rainbow, [1] is a similar phenomenon to a rainbow; however, as its name suggests, it appears as a bow in fog rather than rain. [2] Because of the very small size of water droplets that cause fog—smaller than 0.05 millimeters (0.0020 in)—the fog bow has only very weak colors, with a red outer edge and ...