The blue color of the sky is due to ____.
a. selective scattering of visible light by air molecules
b. the filtering effect of water vapor in Earth's atmosphere
c. reflection of sunlight off Earth's oceans
d. transmission of visible light through the ozone layer in Earth's stratosphere
e. absorption of short wavelengths by air molecules
Question 2
Air molecules selectively scatter visible light because ____.
a. they are smaller than the wavelength of visible light
b. they are much larger than the wavelength of visible light
c. they are the same size as the wavelength of visible light
d. they are unable to absorb electromagnetic waves
e. the electrons that orbit around the nucleus of atoms have a blue color