Allah said in the Quran:
"Or (the unbelievers’ state) is like the darkness in a deep sea. It is
covered by waves, above which are waves, above which are clouds. Darkness, one
above another. If a man stretches out his hand, he cannot see it..." ( Quran,
This verse mentions the darkness found in deep seas and oceans, where if a
man stretches out his hand, he cannot see it. The darkness in deep seas and
oceans is found around a depth of 200 meters and below. At this depth, there is
almost no light (see figure 15). Below a depth of 1000 meters there is no light
at all. Human beings are not able to dive more than forty meters without the aid
of submarines or special equipment. Human beings cannot survive unaided in the
deep dark part of oceans, such as at a depth of 200 meters.
15: Between 3 and 30 percent of the sunlight is reflected at the sea
surface. Then almost all of the seven colors of the light spectrum are absorbed
one after another in the first 200 meters, except the blue light. (Oceans,
Elder and Pernetta, p. 27.)
Scientists have recently discovered this darkness by means of special
equipment and submarines that have enabled them dive into the depths of the
We can also understand from the following sentences in the previous verse,
"... in a deep sea. It is covered by waves, above which are waves, above
which are clouds...", that the deep waters of the seas and oceans are
covered by waves, and above these waves are other waves. It is clear that the
second set of waves is the surface waves that we see, because the verse mentions
that above the second waves there are clouds. But what about the first waves?
Scientists have recently discovered that there are internal waves which
"occur on density interfaces between layers of different densities."
(See figure 16). The internal waves cover the deep waters of seas and oceans
because the deep waters have a higher density than the waters above them.
Internal waves act like surface waves. They can also break just like surface
waves. Internal waves cannot be seen by the human eye, but they can be detected
by studying temperature or salinity changes at a given location.
16: Internal waves at interface between two layers of water of different
densities. One is dense (the lower one), the other one is less dense (the upper
one). (Oceanography, Gross, p. 204.)
The source of this article is www.islam-guide.com
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