The conversation between human and AI assistant.
What is the relationship between the band gap of matter and the wavelength it reflects?
Can you explain it in simpler terms?
Of course! The band gap is like a hurdle that electrons have to jump over to move from one energy level to another. The wavelength it reflects is related to how high that hurdle is - the higher the hurdle, the shorter the wavelength of light that can excite electrons and be reflected.