The word "approximate" means close to or nearly correct, but not exact or precise.
Authors and lecturers use the word "approximate" to indicate that something is not exact or precise, but is close enough for general understanding or estimation.
Scientists use the concept of approximation to simplify complex calculations or measurements and make them more manageable. This allows for a better understanding of the data and can also save time and resources.
Using the word "approximate" can be misleading if it is used to indicate a level of precision that is not actually present. It is important for authors and lecturers to clearly define what they mean by "approximate" and to be transparent about the limitations of their estimations.
Approximate values can be useful for initial research or for gaining a general understanding of a concept. However, for more accurate and reliable results, scientists often strive for more precise measurements and calculations. In some cases, approximate values may also lead to errors or inaccuracies in scientific research.