You will be given a passage, and your task is to generate a Yes/No question that is answerable based on the given passage.

Q: According to the theory of relativity, no information can travel faster than the speed of light in vacuum, but this does not mean that the refractive index cannot be lower than 1. The refractive index measures the phase velocity of light, which does not carry information. The phase velocity is the speed at which the crests of the wave move and can be faster than the speed of light in vacuum, and thereby give a refractive index below 1. This can occur close to resonance frequencies, for absorbing media, in plasmas, and for X-rays. In the X-ray regime the refractive indices are lower than but very close to 1 (exceptions close to some resonance frequencies). As an example, water has a refractive index of 6999999999740000000♠0.99999974 = 1 − 6993260000000000000♠2.6×10 for X-ray radiation at a photon energy of 6985480652946099999♠30 keV (0.04 nm wavelength).

A: can a refractive index be less than 1?
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Q: Game of Thrones is an episodic graphic adventure video game based on the TV series of the same name, which in turn, is based on George R.R. Martin's A Song of Ice and Fire fantasy series, released in December 2014 for Android, iOS, Microsoft Windows, OS X, PlayStation 3, PlayStation 4, Xbox 360 and Xbox One.

A: are they making a game of thrones game?
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Q: The golden goal or golden point is a rule used in association football, bandy, lacrosse, field hockey, ice hockey, floorball and korfball to decide the winner of a match (typically a knock-out match) in which scores are equal at the end of normal time. It is a type of sudden death. Under this rule, the game will end when a goal or point is scored; the team that scores that goal or point during extra time will be the winner. Introduced formally in 1992, though with some history before that, the rule ceased to apply to most FIFA-authorized football games in 2004. The similar silver goal supplemented the golden goal between 2002 and 2004.

A:
does golden goal apply in the world cup?
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