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من طرف sergiomuslim الأربعاء 24 نوفمبر - 22:46:18| The Quran on Deep Seas and Internal Waves: |
God has said in the Quran: |
Or(the unbelievers’ state) is like the darkness in a deep sea. It is covered bywaves, above which are waves, above which are clouds. Darknesses, one aboveanother. If a man stretches out his hand, he cannot see it.... 
(Quran, 24:40)This verse mentions the darkness found in deep seas and oceans, where if a manstretches out his hand, he cannot see it. The darkness in deep seas and oceansis found around a depth of 200 meters and below. At this depth, there is almostno light (see figure 15). Below a depth of 1000 meters there is no light atall.1 Human beings are notable to dive more than forty meters without the aid of submarines or specialequipment. Human beings cannot survive unaided in the deep dark part of theoceans, such as at a depth of 200 meters.
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| Figure 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 equipmentand submarines that have enabled them to dive into the depths of the oceans.
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, abovewhich are clouds....”, that the deep waters of seas and oceans are coveredby waves, and above these waves are other waves. It is clear that the second setof waves are the surface waves that we see, because the verse mentions thatabove 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 differentdensities.”2 (see figure 16).
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| Figure 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 internal waves cover the deep waters of seas and oceans because the deepwaters have a higher density than the waters above them. Internal waves act likesurface waves. They can also break, just like surface waves. Internal wavescannot be seen by the human eye, but they can be detected by studyingtemperature or salinity changes at a given location.
