The thermometer was invented by a famous scientist in the 16th century.

Swedish astronomer Anders

Celsius), the inventor of the thermometer. He divided the temperature difference between the freezing point and the boiling point of water into 100 equal parts, which is known as the "Celsius temperature scale".

1. The earliest thermometer was invented in 1593 by the Italian scientist Galileo Galilei (1564 1642). His first thermometer was a glass tube with an open end and a walnut-sized glass bubble at the other. To use, heat the glass bubble and insert the glass tube into the water.

As the temperature changes, the water surface in the glass tube will move up and down, and according to the amount of movement, the change of temperature and the level of temperature can be determined.

2. The thermometer has the effect of thermal expansion and contraction, so this thermometer is greatly affected by environmental factors such as external atmospheric pressure, so the measurement error is large.

1. The earliest thermometer was invented in 1593 by the Italian scientist Galileo Galilei (1564 1642). His first thermometer was a glass tube with an open end and a large glass bubble with a walnut bush at the other end. To use, heat the glass bubble and insert the glass tube into the water.

As the temperature changes, the water surface in the glass tube moves up and down, and the temperature change and temperature can be determined according to the amount of movement.

2. The thermometer has the effect of hot search stove expansion and contraction, so this thermometer is greatly affected by environmental factors such as external atmospheric pressure, so the measurement error is large.

<>1. Thermometer is a tool that can accurately judge and measure temperature, and the common ones are mercury thermometer, infrared thermometer and electronic thermometer. Among them, the working principle of mercury thermometer is to use thermal expansion and cold contraction, mercury expands and moves up when heated, and shrinks and moves down when cold. The infrared thermometer is based on the amount of infrared radiation of the object to determine the temperature and disadvantages, the higher the temperature of the object, the more infrared radiation is emitted.

Electronic thermometers are designed using the principle of thermistor temperature sensing.

2. The earliest thermometer was invented in 1593 by the Italian scientist Galileo. To use, heat the glass bubble and insert the glass tube into the water. As the temperature changes, the water surface in the glass tube moves up and down.

Later, people repeatedly improved on this basis, such as turning the glass tube upside down and shrinking the glass bubble, which formed the prototype of the modern thermometer.

The thermometer was first invented by the famous Italian scientist Galileo Galilei in 1603. The world's first thermometer was not as small as today's thermometers. It has a glass ball about the size of an egg, and an open glass tube is attached to it, which is inserted into a colored water bottle.

Due to thermal expansion and contraction, the volume of air in the glass sphere changes with temperature. As soon as the glass ball is cold, the air inside begins to shrink, and the water in the water bottle "climbs" up along the glass tubeAs soon as the glass ball became hot, the air inside began to expand, and the water that had been "climbing" up was "driven" down again.

This primitive thermometer was not accurate. Because the water column in the water bottle rises or falls, it is not only affected by the expansion and contraction of the air, the change of temperature between cold and hot, but also by the atmospheric pressure. Soon after, Galileo's students changed the glass tube to a sealed one, and replaced the air in the tube with mercury or alcohol.

In this way, the thermometer is not affected by air pressure.

Before 1714 B.C., thermometer scales were very inconsistent. The first to unify the scale of thermometers was conceived around 1714 by the German meteorological machine builder G. D. Wallenhey (1686-1736). He set the temperature of the mixture of ammonia chloride, water, and ice as the lowest temperature, which was set at zero degrees.

Set the temperature at which the ice dissolves at 32 degrees Celsius and the temperature of the mouth at 96 degrees. Later, people used this thermometer to measure the boiling point of water to be 212 degrees, so the boiling point of 212 degrees and the freezing point of 32 degrees were used as the starting and ending points of the temperature. People take the first word of the Chinese translation of Hua Lunhai's name and call this thermometer Fahrenheit thermometer.

Fahrenheit thermometers are mainly used in the United Kingdom and the United States.

At present, except for the United Kingdom and the United States, Celsius thermometers are widely used in the world. The name of this thermometer is the first word in the Chinese translation of the name of the Swiss Sercian Sercius (1701-1744). In 1742, Serchem proposed that the Jen's thermometer, which took the freezing point of water to the beginning, was the opposite of what was currently in use, setting the freezing point at one and the boiling point at zero.

However, it seems that someone soon realized that the stool was inconvenient to use. So, in 1743, the year after Recel invented the Celsius thermometer, someone turned the scale upside down, with the freezing point as zero and the boiling point as one.

Whether the inventor of the Celsius thermometer is really Recelcer is controversial in many countries. In particular, the British and American countries did not recognize Celxiu as the inventor of the Celsius thermometer. The notation of Celsius thermometer is written

It is generally believed that the C is the English prefix for Cherche, but the British and American countries say that it is the prefix for centigrade. It was not until 1848 that the British and American countries made a compromise concession for the sake of a unified interpretation, and the unified interpretation of C was the prefix for Celxiu.

The principle of thermal expansion and contraction, invented by Galileo, was widely used in early thermometers, and in this way, human body temperature was measured.

It was made by the principle of thermal expansion and cold contraction, and Galileo invented the thermometer, and this was used to test temperature in the early days.

It is made according to the cause of thermal expansion and contraction of liquid. Galileo, he was an Italian scientist, he was very smart.