the light theory is used in photography to make a image stand out more.
Light particle
Light particle is both a particle and a wave Another word for particle is photon
Refraction
Refraction is a wave going in a direction changing its speed. When light passes through a denser e.g a prism,water or glass. It occurs through a transparent object.
Reflection
Refraction is a change in direction of wave front between two objects. An example of reflection is if you put a object in front of a mirror u will see it from the mirror as well.
Spectrum of color
Spectrum of color is the distribution of colors produced when a light is shined on a prism. The color with the highest energy is red and the one with the lowest is violet. The top is the lightest variation of the color and the bottom is the darkest.