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Black light theatre
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Black light theatre : ウィキペディア英語版
Black light theatre
Black Light Theatre (in Czech ''černé divadlo'') or simply Black Theatre, is a theatrical performance style characterized by the use of black box theatre augmented by black light illusion. This form of theatre originated from Asia and can be found in many places around the world. It has become a speciality of Prague, where many theatres use it.〔http://blacklighttheatre.wbs.cz/tisk-press.html〕
The distinctive characteristics of "black theatre" are the use of black curtains, a darkened stage, and "black lighting" (UV light), paired with fluorescent costumes in order to create intricate visual illusions. This "black cabinet" technique was used by Georges Méliès, and by theatre revolutionary Stanislavsky. The technique, paired with the expressive artistry of dance, mime and acrobatics of the performers is able to create remarkable spectacles.〔http://www.tafantastika.cz/en/black-light-theatre/index.php#〕
==Optics==
]
A key principal of Black Light Theatre is the inability of the human eye to distinguish black objects from a black background. This effect results in effective invisibility for any objects not illuminated by the 'black light'.〔 The second optical principal behind Black Light Theatre is the effect of UV light on fluorescent objects. Black lights actually emit as much light as 'normal' lights, but at a frequency that humans cannot detect. While most objects either absorb UV light or reflect it back at the same frequency at which it came in, fluorescent objects absorb UV light then re-emit it at a longer wavelength than human eyes can detect.〔http://van.physics.illinois.edu/qa/listing.php?id=1913〕 The combined effect is that designers can make some objects appear as bright as if the room were fully lighted, while making other objects appear as dark as if the room were completely dark.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Black light theatre」の詳細全文を読む



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