A note on good practice: The square

A note on good practice:
The square of a wavefunction is a probability density, and (in three dimensions) has the dimensions of 1/length3.
It becomes a (unitless) probability when multiplied by a volume.
In general, we have to take into account the variation of the amplitude of the wavefunction over the volume of interest, but here we are supposing that the volume is so small that the variation of ψ in the region can be ignored.

Hasil (Bahasa Indonesia) 2:

Catatan tentang praktek yang baik:
The persegi fungsi gelombang adalah kepadatan probabilitas, dan (dalam tiga dimensi) memiliki dimensi 1 / length3.
Ini menjadi (unitless) probabilitas ketika dikalikan dengan volume.
Secara umum, kita harus mengambil memperhitungkan variasi amplitudo fungsi gelombang atas volume bunga, tetapi di sini kita mengandaikan bahwa volume sangat kecil sehingga variasi ψ di wilayah tersebut dapat diabaikan.