Why is it that a wavelnegth reflects on something? I understand that white reflects all wavelengths because it contains all the spectrums of wavelengths, but WHY is it that is actually reflects? Like, is it because two matching wavelengths reflect? Please explain.

Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy