Abstract
We have noted that according to Maxwell’s theory of electromagnetism, light is nothing but a visible electromagnetic (EM) wave that has a frequency in the narrow range ∼ 4 ×1014 Hz to ∼ 7 ×1014 Hz. The corresponding range of wavelengths is 4,000–7,000 { A}. Furthermore, EM waves are produced and emitted by accelerating electric charge. There are two interesting questions that immediately confront us: (1) We accept the premise that animal eyes evolved so as to be sensitive to sunlight. Still, what characteristics of animal eyes makes them sensitive to this particular narrow range of frequencies? (2) What are the physical characteristics of the sun that causes sunlight to be concentrated in a particular range of frequencies?
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