Does the verse from Surat Yunus/61 (وَمَا يَعْزُبُ عَنْ رَبِّكَ مِنْ مِثْقَالِ ذَرَّةٍ - And there is not absent from your Lord the weight of an atom) refer to the scientific atom or to the tiny red ant? And why does a single Quranic verse admit multiple meanings, and which of them is the correct meaning, such as the difference in the translation of "dahaahaa" in Surat An-Nazi'at?

The majority of reported differences in the interpretation of the Quran are differences of diversity, not contradiction, and they fall into two categories: 1. When interpreters express the intended meaning with different phrases that denote a meaning in the referent other than another meaning, while the referent is the same. An example of this is interpreting "the straight path" as the Quran, or Islam, or the Sunnah (definition) and the community. All of these refer to one entity with different descriptions. 2. When each of them mentions some of the types of a general name by way of example. An example of this is the interpretation of "wrongdoer," "moderate," and "foremost in good deeds" in His, the Almighty’s, saying: (Then We caused to inherit the Book those We chose of Our servants; and among them is he who wrongs himself, and among them is he who is moderate, and among them is he who is foremost in good deeds). Every saying mentions a type included in the verse to inform the listener.

This is similar to the interpretation of "an atom's weight," where there is no contradiction in the statements; rather, all of them refer to something extremely small. The intention is that Allah does not wrong anyone, whether a little or a lot.

As for genuine differences in meaning, preference is given according to the rules of preference considered by interpreters.