Answer: Scattering of shorter wavelength (blue) light.
- A Reflection of sunlight off the ocean surface below
- B Dispersion of sunlight through atmospheric water droplets
- C Scattering of shorter wavelength (blue) light
- D Selective absorption of red light by oxygen molecules
Correct answer: C. Scattering of shorter wavelength (blue) light
Explanation: Rayleigh scattering: shorter wavelengths (blue) scatter more. Scattered blue light reaches our eyes from all directions.
Concave mirror ray construction: a ray parallel to the axis reflects through F, and a ray through F reflects parallel, locating the inverted real image. Image: Maxmath12, CC0, via Wikimedia Commons.
Concept context
Reflection, refraction, lenses, mirrors, total internal reflection.