The Wave Nature of light: Interference Chapter 30 Rainbow: the incident wavelengths are bent through different angles as they pass through raindrops that produce the bow. (Geometrical optics However, soap bubbles(肥皂泡) and oil slicks (油膜) can also show striking colors, produced not by refraction but by constructive and destructive interference oflight. Light is wave, because interference(干涉)and diffraction(衍射) cannot be explained other than with wavesThe Wave Nature of Light; Interference Chapter 30 Rainbow: the incident wavelengths are bent through different angles as they pass through raindrops that produce the bow. (Geometrical optics) However, soap bubbles（肥皂泡） and oil slicks （油膜） can also show striking colors, produced not by refraction but by constructive and destructive interference of light. Light is wave, because interference （干涉）and diffraction（衍射） cannot be explained other than with waves