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The Barometer. Evangelista Torricelli became the first scientist to create a sustained vacuum and to discover the principle of a barometer. Torricelli realized that the variation of the height of the mercury from day to day was caused by changes in the atmospheric pressure.
The âCorpuscular theory of light was proposed by Newton in 1704. In this theory, he successfully explained the nature of light. The corpuscular theory is the simplest theory of light in which light is assumed as the tiny particles called âcorpusclesâ. The corpuscular theory is often referred to as particle theory or Newtonâs theory of light.