Modern Physics I - SS3 Physics Past Questions and Answers - page 2

In classical physics, particles are treated as discrete, point-like objects that can be accurately located in space and time. However, in quantum mechanics, particles are described by wave functions, which are mathematical representations of the probability distribution of the particle's position and momentum.

In the double-slit experiment, particles such as electrons or photons are fired through two slits and create an interference pattern on a screen behind the slits. This interference pattern is characteristic of waves, and can only be explained if we assume that the particles are behaving like waves.

The atomic structure describes the arrangement of subatomic particles, including protons, neutrons, and electrons, within an atom.

The Bohr model is a simplified model of the atom proposed by Danish physicist Niels Bohr in 1913, which helped to explain the behaviour of atoms and their spectral lines.