Part 6/10:
The discussion of quantum mechanics brings forth the need to understand momentum and position for quantum entities. Historically, it was believed that light was merely an electromagnetic wave, until several experiments (like the photoelectric effect) indicated its quantized nature. This realization paved the way for the understanding that particles can also possess wave properties, leading to the hypothesis that electrons exhibit wavelengths as well.
The momentum of quantum objects is intrinsically linked with their wavelength, which means that the momentum can be expressed through the equation involving Planck’s constant (h) divided by their wavelength. This understanding reshapes how we approach momentum calculations for electrons and other quantum entities.