All light is composed of photons: small packets of light energy in the form of waves with a defined frequency and wavelength. However, not all light is the same. Different wavelengths of light represent different colors on the light spectrum.
When light is projected as a single, coherent wavelength where the waves travel parallel to each other, it’s considered laser light. Laser light is much more intense than regular white light and has a multitude of applications from scanning barcodes to treating pain, inflammation, and more within human (and animal) bodies.