Question

In order for an apple to appear red to us, what color(s) are absorbed and what color(s) are reflected?

Answer 1

The electromagnetic spectrum includes different electromagnetic radiations like X rays, gamma rays, UV rays, visible light, infrared radiation, micro-waves and radiowaves. The visible light ranges from 400nm to 700nm and is detectable by the eyes. Different colors are produced, each having a different wavelength. Every object absorbs certain wavelengths of the visible light and reflects the remaining wavelength. The part reflected determines its color.

If an apple is red, it reflects red light (700nm) and absorbs most other wavelengths of the visible light (violet, indigo, blue, green, yellow, and orange).