【Daily Question】Theoretical Foundation 2019.5.22
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Multiple-choice question: At sunrise and sunset, the sun appears bright red because: ( ) A. Blue light has a short wavelength and is highly transmitted. B. Blue light has a short wavelength and is highly refracted. C. Red light has a long wavelength and is highly transmitted. D. Red light has a long wavelength and is highly scattered. Answer: C. As sunlight passes through the thick atmosphere, short-wavelength light such as blue and violet light, which is highly scattered, is dispersed; what remains is the long-wavelength light such as red and yellow light, which is highly transmitted. Tip: The answer can be seen in the reply
D. Red light has a long wavelength, resulting in significant scattering
C. Red light has a long wavelength, and its transmittance is significant
C. Red light has a long wavelength, and its transmission effect is significant
C. Red light has a long wavelength, and its transmittance is significant