The visible spectrum of electromagnetic radiation we call light.
Notice how it starts deep red, cycles through the colors and almost
returns to red again.
This is because once the electromagnetic frequency doubles, it becomes
the same color.
Just like in music, when the frequecy of the note doubles, it becomes
an octave of the same note.
So essentially, we can see one octave of the electromagnetic spectrum.
If we could see all the different frequencies,
the rainbow would continue all the way down to the horizon,
cycling through all the colors over and over,
the lines exponentially getting closer and closer together as it nears
There should be a Leprechaun right about .... there.
An interactive map of the trail to the top of Mount Olympus.
Notice how that from the top of Blister Hill (Click "Names"
above) to the saddle,
looks almost as far as from the saddle to the summit.
This is an illusion. in reality the saddle to the top is only about
1/3 the distance of the other.
One of the most interesting aspects of Mount Olympus is how
it has been folded up nearly 80 degrees like pages in a book.
Click "Strata" above to show layers that were all once flat
but have been warped by plate tectonic pressure.
Like a giant Mexican sombrero on Mount Olympus' head.
The light conditions during a rainbow are always amazing in all directions.
For more pictures from approximately the same place four years earlier:
July 11, 2001 : Wasatch