Page 124 - The Creation Of The Universe

122 THE CREATION OF THE UNIVERSE

Radiation
suitable for
biological
vision

Gamma rays (10 ) Visible light Radio waves (10 )
-16
9
wavelengths (microns)
The only rays of light that are suitable for biological vision have wavelengths that fall
within the range of what is called "visible light". A large part of the energy that is emit-
ted by the Sun falls in that range.

UV, X-ray, and gamma rays are too energetic and are highly destruc-
tive, while infrared and radio waves are too weak to be detected be-
cause they impart so little energy interacting with matter... And so it
would appear that for several different reasons, the visual region of the
electromagnetic spectrum is the one region supremely fit for biological
vision and particularly for the high-resolution vertebrate camera eye of
a design and dimension very close to that of the human eye. 73
Pausing to think about everything that has been said so far, we come to
this conclusion: The Sun radiates energy within a narrow band (a band so
25
narrow that it corresponds to just 1/10 of the whole electromagnetic spec-
trum) that has been carefully chosen. So finely adjusted is this band that it
keeps the world warm, supports the biological functions of complex life-
forms, enables photosynthesis, and allows the creatures of this world to
see.