Answer: Light reflects when it hits a surface.
Step-by-step explanation:
It is now clear that light behaves as a wave and as a particle. It should be noted that the first to propose the corpuscular theory of light was Issac Newton, while the wave theory was initially proposed by Christian Huygens, who was contemporaneous with Newton.
Now, focusing on the corpuscular theory, Newton proposed that light is composed of tiny massless particles, traveling in a straight line and at high speed. In addition, he used the reflection phenomenon of the of light to show that it behaved like particles that when hitting a mirror were reflected by a perfectly elastic collision.