Question

The sun appears red at the time of sun-rise and sun-set. This is because:

• A. red colour is least scattered
• B. red colour is most scattered
• C. the sun is red in colour
• D. our eyes can sense only red colour

Answer 1

Answer: (A)

red colour is least scattered

Among the constituent colours of white light, red has the longest wavelength and hence least frequency. Scattering is inversely proportional to wavelength .As a result, red is least scattered among all colours. So, red colour reaches our eyes while all other colours scatter away during sun-rise and sun-set.