the person who made the discovery, what is his profession?
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who discovered that light travels faster than sound Abū Rayhān al-Bīrūnī define the 'speed of light' UNANSWERABLE
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Speed of light [SEP] Introduction
The speed of light in vacuum, commonly denoted , is a universal physical constant important in many areas of physics. Its exact value is defined as (approximately ). It is exact because, by international agreement, a metre is defined as the length of the path travelled by light in vacuum during a time interval of second. According to special relativity, is the upper limit for the speed at which conventional matter and information can travel. Though this speed is most commonly associated with light, it is also the speed at which all massless particles and field perturbations travel in vacuum, including electromagnetic radiation (of which light is a small range in the frequency spectrum) and gravitational waves.