Question

Why is wave packet needed to represent a moving particle?​

Answer 1

Answer:

Motion of a wave packet implies that the region in which the particle can be found changes position. Motion of wave packets is not just important for understanding where particles in free space end up.

Answer 2

$\huge\mathfrak\purple{Answer}$

Motion of a wave packet implies that the region in which the particle can be found changes position. Motion of wave packets is not just important for understanding where particles in free space end up. ... That means that the magnitude of the component waves must not change with space nor time.