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The world's smallest thermometer was invented by molecular biophysicist Marcelo A. Carignano. This nanoscale thermometer is made from a single DNA strand with fluorescent markers that glow different colors depending on the temperature, allowing for precise temperature measurements at the nanoscale level.
The smallest unit on the Celsius thermometer is 1 degree Celsius.
The bimetal thermometer was invented by Johan August Arfwedson in 1860.
Anders Celsius, a Swedish astronomer, invented the Celsius thermometer in the 18th century.
The least count of a thermometer is the smallest temperature difference that it can measure accurately. Typically, for a standard mercury-in-glass thermometer, the least count is 0.1°C.
The modern-day thermometer was invented by Daniel Gabriel Fahrenheit in the early 18th century. He is credited with introducing the mercury thermometer and developing the Fahrenheit temperature scale that is still used in some countries today.