Visible light (commonly referred to simply as light) is electromagnetic radiation that is visible to the human eye, and is responsible for the sense of sight. Visible light has a wavelength in the range of about 380 nanometres to about 740 nm – between the invisible infrared, with longer wavelengths and the invisible ultraviolet, with shorter wavelengths.

Primary properties of visible light are intensity, propagation direction, frequency or wavelength spectrum, and polarisation, while its speed in a vacuum, 299,792,458 meters per second (about 300,000 kilometers per second), is one of the fundamental constants of nature. Visible light, as with all types of electromagnetic radiation (EMR) is experimentally found to move at exactly this same speed in vacuum.

In common with all types of EMR, visible light is emitted and absorbed in tiny "packets" called photons, and exhibits properties of both waves and particles. This property is referred to as the wave–particle duality. The study of light, known as optics, is an important research area in modern physics.

John Anthony Frusciante ⁱ/fruːˈʃɑːnteɪ/; born March 5, 1970) is an American guitarist, singer, songwriter, record and film producer. He is best known as the former guitarist of the rock band Red Hot Chili Peppers, with whom he had been for a number of years and recorded five studio albums. Frusciante has an active solo career, having released ten albums under his own name, as well as two with Josh Klinghoffer and Joe Lally as Ataxia. His solo recordings include elements ranging from experimental rock and ambient music to New Wave and electronica. Influenced by guitarists of various genres, Frusciante emphasizes melody and emotion in his guitar playing, and favors vintage guitars and analog recording techniques.

Frusciante joined the Red Hot Chili Peppers at eighteen years old, first appearing on the band's 1989 album, Mother's Milk. The group's follow-up album, Blood Sugar Sex Magik (1991), was a breakthrough success. However, he was overwhelmed by the band's new popularity and quit in 1992. He became a recluse and entered a long period of drug addiction, during which he released his first solo recordings: Niandra Lades and Usually Just a T-Shirt (1994) and then Smile from the Streets You Hold (1997). In 1998, he successfully completed drug rehabilitation and rejoined the Red Hot Chili Peppers with the album Californication (1999). His album To Record Only Water for Ten Days was made in 2001. On a creative spree, Frusciante released six solo albums in 2004; each album explored different recording techniques and genres. In 2009, Frusciante released The Empyrean and again parted ways with the Red Hot Chili Peppers. As of 2011, Frusciante is currently working on his eleventh solo album. Frusciante has produced and/or recorded with the Wu-Tang Clan, The Mars Volta, George Clinton and others. His most recent solo releases will be a 5 song EP entitled Letur-Lefr, due out in July 2012, and a full length album entitled PBX Funicular Intaglio Zone, due out in late 2012.

Terri Walker (born Chanelle Gstettenbauer, 14 April 1979) is an English R&B and soul singer–songwriter. Walker has released three albums in the United Kingdom, Untitled, L.O.V.E, and I Am. She also provided the majority of the vocals for Shanks & Bigfoot's debut album Swings & Roundabouts. Walker's fourth studio album Walk with Me is due for release in 2011.

Walker, born in the Wimbledon district of London, England, to Jamaican parents, moved to Regensburg, Bavaria, Germany, when she was four. She speaks fluent German. In a 2007 interview with Soul Culture, Walker stated that "I love Deutschland, it’s moulded me into what I am. I love here [London] too and I came back to go to boarding-school in London when I was 11. The thing is I still lived in Germany and didn’t actually come back proper till I was 17″. At the age of seventeen, Walker moved back to the UK permanently to study at the Italia Conti Academy of Theatre Arts in London, which is a performing arts centre of excellence. Here, she she began to study and sing opera. Walker stated that "I started to study opera when I was about 15 and I started to sing it professionally from about 18. It was always a life-long ambition of mine. I think classical training is the best kinda training you can get."