What is Superposition?
The Double-Slit Experiment
Feynman concluded that each photon along with going through both slits simultaneously takes all the possible trajectories to the target.
The Experiment mainly concentrates on tracking the paths of every photon individually. Here the measurement disrupts the trajectories of photons, and the results becomes what is based on classical physics, i.e., two bright lines are aligned to the slits of the barrier. The pattern again becomes multiple lines in different degrees of darkness and lightness.
Every photon moves in a superposition of possible parameters simultaneously, and measurement of the path makes the superposition of states to a single position.
At the quantum scale, particles can be considered as waves. They can be in different states, for example, they can be in different positions, differ in energies or moving at different speeds. If you think about particles, it means that a particle can exist in two places at once. This doesn’t make much sense but is a part of quantum physics.However, once a particle is measured, for example, its energy or position is known, the superposition doesn’t exist, and we have a particle in one known state.