# Optics

Hello! Let’s finish this unit together. Shouldn’t be too hard. Please add your knowledge, comment for constructive criticism, and cooperate, cause writing articles is a skill that you’re gonna have to master. Let’s get started.

$$ax^{2}+bx+c=0\nonumber \\$$

## Photons

Photons are massless particles. They show wave-particle duality, which means that they’re like waves and particles at the same time. They travel at the speed of light. A photon is the smallest quantity of energy (actually, that’s not true. It’s the smallest quantity of electromagnetic radiation which can be transported. This is called the ”quantum” of EM radiation) which can be transported. Light is a continuous stream of photons.