Measurement of Temperature

When we have fever, we go to the doctor

Doctors use a device called thermometer which measures our body temperature, based on which they provide treatment

Let's understand what is Temperature

Temperature refers to the hotness or coldness of a body.

Temperature is usually measured by a thermometer.

The most popular scales of measuring temperature are Celcius and Fahrenheit

The average normal body temperature is generally accepted to be or

In any thermometer, there are two fixed points, the lower fixed point and the upper fixed point.

The lower fixed point corresponds to the temperature of freezing water.

The upper fixed point is the boiling point of water.

The scale is fixed with an equal number of intervals and each interval measures 1 degree () on the scale used.

The S.I. unit for measurement of temperature is Kelvin (K)

Kelvin is usually used by scientists for laboratory purposes.

We do not write , rather it is simply written

is known as absolute zero and in reality, no object can attain this temperature

Because at this temperature all atomic movements cease.

In other words, there is nothing below absolute zero and Kelvin scale stops at zero or cannot be negative.

Celcius and Fahrenheit scales are based on the melting point of ice and boiling point of water.

or was defined as the melting point of ice

or was defined as the boiling point of water

Based on these comparisons, Celcius and Fahrenheit thermometers were made.

And the idea of temperature as a measurement of the amount of heat came into existence

For example, is nothing but the measure of the amount of heat in ice when it starts melting

Or, is nothing but the measure of the amount of heat in water when it starts boiling

It is a common habit to relate scales for our convenience.

First of all, Kelvin and Celcius scales are quite similar.

Similarly, we can convert between Celcius and Fahrenheit scales: , where and are temperatures in Celcius and Fahrenheit respectively

An interconversion between Kelvin and Fahrenheit can also be achieved as , where and are temperatures in Kelvin and Fahrenheit respectively

Revision

Temperature refers to the hotness or coldness of a body.

It is measured in Celcius and Fahrenheit Thermometers but the S.I. Unit of Temperature is Kelvin

Temperature is a comparison based quantity. Reference points were decided as the melting point of ice and boiling point of water

The End