Question

The temperature of a body is measured in Kelvin scale, Fahrenheit scale and Celsius scale. Which among them is a more accurate reading? Explain.

Answer 1

Kelvin scale:

1. The Kelvin scale is a unit of temperature.
2. In Kelvin scale where absolute zero was the null point, which means that $0K$ is the lowest possible temperature ($-{273}^{0}C$).
3. The Kelvin Scale uses Celsius for its unit increment, meaning that $+1K$ is the same as $+1{}^{0}C$.

Fahrenheit scale:

1. Fahrenheit scale is a temperature scale that is based on the freezing point of water at ${32}^{0}F$ and the boiling point of water at ${212}^{0}F$.
2. The region between these two temperatures is divided into $180$ equal parts so that each part equals to one Fahrenheit degree ($1^{0}F$).

Celsius scale:

1. Celsius scale, or centigrade scale, is a temperature scale that is based on the freezing point of water at $0^{0}C$ and the boiling point of water at ${100}^{0}C$.
2. The region between these two temperatures is divided into $100$ equal parts so that each part equals to one degree Celsius ($1^{0}C$).

Which among them is a more accurate reading:

1. Number of division between LFP and UFP in Kelvin scale and Celsius scale are $100$ equal parts.
2. Number of division between LFP and UFP in Fahrenheit scale is $180$ which is more than that on kelvin or Celsius scale.
3. We know that, by increasing the divisions in the scale, the accuracy of the scale will increase.
4. Also more divisions can record minor values better than less number of division in scales.

Hence, the temperature of a body is measured in Fahrenheit scale is a more accurate reading.