Invisibility is the state of an object that cannot be seen. An object in this state is said to be invisible (literally, "not visible"). The term is often used in fantasy/science fiction, where objects cannot be seen by magical or technological means; however, its effects can also be demonstrated in the real world, particularly in physics and perceptual psychology classes.
Since objects can be seen by light in the visible spectrum from a source reflecting off their surfaces and hitting the viewer's eye, the most natural form of invisibility (whether real or fictional) is an object that neither reflects nor absorbs light (that is, it allows light to pass through it). This is known as transparency, and is seen in many naturally occurring materials (although no naturally occurring material is 100% transparent).
Invisibility perception depends on several optical and visual factors. For example, invisibility depends on the eyes of the observer and/or the instruments used. Thus an object can be classified as "invisible to" a person, animal, instrument, etc. In research on sensorial perception it has been shown that invisibility is perceived in cycles.
"Invisible" is a song by English electronic music group Tilt, which reached the UK top 20 charts when released in 1999. The song was co-written by Dominique Atkins, from Grace fame, who also provided the vocals.
"Invisible" is a song recorded by Alison Moyet in 1984, written by Lamont Dozier (of the songwriting team Holland–Dozier–Holland), from her album Alf.
Reaching #21 on the UK Singles Chart, the song went as high as #6 in Ireland, and gave Moyet her third Irish top 10 hit of the year. The single went even higher in New Zealand, peaking at #4, her second consecutive top ten hit after "All Cried Out" reached #6. The song is also the first American release from the album and is Moyet's most successful single in that country, reaching #31 on the Billboard Hot 100 in the spring of 1985 and becoming her only US Top 40 hit, either solo or with Yazoo, thus far.
There are two versions of the music video for the song. In the first version, Moyet is seen at a party surrounded by friends, all of whom appear to have partners of various forms. She walks into another room to perform the song. Moyet is often seen singing alone outside, or in what appears to be a cupboard. There are also many cutaways to where Moyet walks through the party unnoticed (hence, she is invisible). The video ends with her drinking a glass of wine and lost in thought. The second version of the video mostly features Moyet performing the song and omits many of the party scenes. It concludes with Moyet walking out of the room and into a white light. In both videos, there are moments when the camera pans on what seems to be a silver rhombus with the letter 'i' in the middle.
Vortex is a high-fidelity, realtime physics engine developed by CM Labs Simulations that simulates rigid body dynamics, collision detection, contact determination, and dynamic reactions. Vortex adds accurate physical motion and interactions to objects in visual-simulation applications for operator training, mission planning, product concept validation, vehicle and robotics testing, haptics devices, immersive and virtual reality (VR) environments.
The Vortex C++ SDK has several modules that simulate physics-based particles, sensors, floating bodies, cable systems, grasping, and wheeled and tracked vehicles. Developers integrate their projects into 3D visualization frameworks such as OpenSceneGraph (OSG) and Vega Prime, and deploy them in environments that contain software-in-the-loop (SIL), MATLAB, hardware-in-the-loop (HIL), and motion platform components.
Vortex is developed by CM Labs Simulations Inc., a private company established in Montreal in 2001. CM Labs was created when the management of MathEngine Canada Inc. purchased a portion of the business from MathEngine PLC, the parent company in the UK. MathEngine Canada Inc. was originally the research and development team responsible for creating the Karma physics simulation engine for computer games.
Season two of Smallville, an American television series developed by Alfred Gough and Miles Millar, began airing on September 24, 2002, on The WB television network. The series recounts the early adventures of Kryptonian Clark Kent as he adjusts to life in the fictional town of Smallville, Kansas, during the years before he becomes Superman. The second season comprises 23 episodes and concluded its initial airing on May 20, 2003. Regular cast members during season two include Tom Welling, Kristin Kreuk, Michael Rosenbaum, Sam Jones III, Allison Mack, Annette O'Toole and John Schneider. John Glover who was a recurring guest in season one was promoted to regular for season two. At the end of season one, Eric Johnson, who portrayed Whitney Fordman, had left the show.
Season two picks up directly where season one ended, with Clark (Welling) dealing with the aftermath of the tornadoes that hit Smallville. This season, Clark finally learns who he is and where he comes from, but must also acknowledge a potential destiny set into motion by his biological father that could change his life and the lives of those around him forever. Clark's relationship with Lana Lang (Kreuk) becomes increasingly closer, straining his friendship with Chloe Sullivan (Mack). Clark's best friend, Pete Ross (Jones III), learns Clark's secret this season.
In the Dungeons & Dragons fantasy role-playing game, the vortex is a type of elemental creature.
The vortex first appeared in the original first edition Fiend Folio (1981). Published first edition Advanced Dungeons and Dragons adventures which included Vortexes as adversaries that the players encounter included "The Ruins of Andril", published in Dragon #81.
The vortex appeared in second edition Advanced Dungeons & Dragons for the Planescape setting in the Planescape Campaign Setting boxed set (1994).
A vortex is an elemental creature with the ability to create a whirlwind to attack other creatures.
Bakufu Slump (爆風スランプ, Bakufū Suranpu) was a Japanese rock band active 1982-1999. During the 80s and 90s the band was "hugely popular" in Japan.
Among their best known songs was "Runner".
Drummer Funky Sueyoshi went on to form X.Y.Z. with Minoru Nihara, former lead vocalist of Japanese metal band Loudness (band).
I see the ocean when I look into your eyes
A depth of green I know to drown in it would be nice
A perfect creature born in this imperfect world
I know all of your secrets that you kept untold
It’s a magic rite
Don’t know black or white
Tension, invisible tension
Strange game between me and you
Ancient, this story’s so ancient
Ancient but every time it’s new
I feel your presence even when you’re far away
You are my star at midnight, you’re the light of day
You have two faces, you’re the angel, you’re the beast
I knew your love and now I’m falling to abyss
It’s a magic rite
Don’t know black or white
Tension, invisible tension
Strange game between me and you
Ancient, this story’s so ancient
Ancient but every time it’s new
Tension, invisible tension
Strange game between me and you
Ancient, this story’s so ancient
Ancient but every time it’s new
Tension, invisible tension
Strange game between me and you
Ancient, this story’s so ancient
Ancient but every time it’s new