A green apple appears green to our eyes because it interacts with light in a specific way. When white light, which is made up of all colors in the visible spectrum, shines on the apple, the apple’s surface absorbs certain wavelengths of light.
In the case of a green apple, it absorbs most of the colors except for green wavelengths, which it reflects. These reflected green light waves then travel to our eyes and are detected by photoreceptor cells in the retina. Our brain processes this information, and we perceive the color of the apple as green.
This phenomenon is related to the physics of light and color perception. Objects do not emit their own color; instead, the color we see depends on how they interact with specific wavelengths of light. So, the green apple’s ability to reflect green light while absorbing other colors is what gives it its characteristic hue.