While it is true that a dentist can use a special light during a teeth whitening procedure, it is not the light that actually changes the color of the teeth.
The light is simply a catalyst that activates a chemical reaction in the whitening gel or solution that is applied to the teeth.
Most teeth whitening products use a peroxide-based gel or solution, which breaks down into water and oxygen ions when it comes into contact with the teeth.
These oxygen ions then penetrate the enamel and dentin of the teeth, breaking apart the chemical bonds that cause tooth stains and discoloration.
The process of whitening teeth can take several treatments, with the use of a special light during each treatment to help speed up the chemical reaction.
So, in short, it is not the light itself that changes the color of Jayden's teeth, but rather the chemical reaction that is activated by the light.