The inventor of Thermos Flask is
Sir James Dewar invented the Thermos flask in 1892. He designed it to minimize heat transfer by creating a vacuum between two layers, effectively keeping liquids hot or cold for longer periods.
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Sir James Dewar invented the Thermos flask in 1892. He designed it to minimize heat transfer by creating a vacuum between two layers, effectively keeping liquids hot or cold for longer periods.
The correct answer is [A] Dewar. Sir James Dewar, a Scottish scientist, is credited with inventing the Thermos flask in 1892. Dewar was a chemist and physicist known for his work in cryogenics and the study of low-temperature phenomena. He created the vacuum flask, or Dewar flask, as part of his research on the liquefaction of gases. The design involved placing one glass bottle inside another and evacuating the air between them, creating a vacuum that significantly reduced heat transfer by conduction and convection. This innovation was essential for maintaining substances at stable temperatures for extended periods. Although Dewar invented the flask, he did not patent it. Later, the German company Thermos GmbH commercialized the design, leading to the product being commonly known as the Thermos flask. The invention has since become a staple in both scientific laboratories and everyday use for keeping liquids hot or cold.