Description
Transcript: Scientists use a different temperature scale from the one you’re probably used to. The Fahrenheit temperature scale is an archaic system of units that has been abandoned by most scientists. It was invented almost 300 years ago. Scientists and most Europeans use the Celsius measurement for temperature where the boiling point of water is 10 degrees Celsius or centigrade and the freezing point of water is zero. The Celsius scale essentially takes the difference between the freezing and boiling points of water and divides it into a hundred equal units. Scientists however use the Kelvin temperature scale. A degree Kelvin is equal to a degree centigrade or Celsius, but the zero point is much lower. In the Kelvin scale the boiling point of water is 373 Kelvin and the freezing point of water is 273 Kelvin. Room temperature is about 295 Kelvin.
Transcript: Light and all other forms of electromagnetic radiation travel at 300 thousand kilometers per second or 186 thousand miles per second. This is the speed of light denoted by the small letter “c”. The speed of light is so fast that it was not possible to measure it in ancient times. ...
Published 07/19/11
Transcript: Faraday showed that the forces of electricity and magnetism were related, but what did this have to do with light? The answer was provided in the 19th century by the Scottish physicist James Clark Maxwell. Maxwell was a theorist who produced an elegant theory of light and...
Published 07/19/11
Transcript: Michael Faraday was a brilliant, self taught, English physicist who lived about two hundred years ago. He rose from being a book binder’s apprentice to the director of the Royal Institution in London, the foremost scientific society of its age. Faraday was a brilliant experimenter...
Published 07/19/11