Final answer:
Light undergoes refraction when passing from air to glass; the photoelectric effect is not limited to visible light. Light has no rest mass, but gravity can bend its path. Humans only see a small part of the electromagnetic spectrum, yet light can travel through a vacuum to reach the eye.
Step-by-step explanation:
The statement regarding light and its interaction with materials and perception by humans encompasses various principles of physics. When light rays travel from air into glass, they slow down and bend due to a change in medium, a phenomenon known as refraction. In the context of the photoelectric effect, it's not only visible light that can cause this effect; ultraviolet light is typically more effective. This concept is critical to understand as the photoelectric effect is pivotal in the field of quantum physics and has numerous technological applications.
Furthermore, light, which can be described as a particle or a wave, indeed has no rest mass. Yet, due to the theory of general relativity, we know that gravity can bend a beam of light, which is an observation confirmed by the bending of light around massive objects such as stars or galaxies.
When it comes to how humans detect light, we can only see a tiny part of the electromagnetic spectrum; hence, it is false that humans see most of the light spectrum. Nonetheless, it is True that light signals can pass through a vacuum into the eye, as light does not require a medium to propagate, unlike sound, which requires a medium such as air or water to travel.