Layers of darkness of the deep sea

  Most of the seas and oceans are covered with thick culumus clouds that block a great proportion of sunlight, as is sown by most satellite pictures. these clouds reflect back a lot of the sun's rays and keep out a lot of its light. Of the light that remainis, the ater reflect back a great deal of it, and absorbs the rest, so that the light decreases the deeper you go in the water. In his book Marines Optict, Gerloff says that the level of light in the water of the ocean is reducedat a depth of 35 metters to ten percent of its level at the surface, and to 1 percent  at a depth of 85 metetes, and to 0,1 percent at a depth of 135 metters, and to 0,01 percent at a depth 190 metters. After a depth of 1,000 metters the darkness grows so deep that there is virtually  no visibiliti and if a man stretches out his hand, he would not be able to se it.

  These astonishing scientific facts are mentioned in the Holy Qur'an which came down to Arabs in the desrts who did not  know how to swim or sail in the sea an oceans. In the fortieth Verse of  Al-Noor, Allah Most High, says:

أَوْ كَظُلُمَٰتٍۢ فِى بَحْرٍۢ لُّجِّىٍّۢ يَغْشَىٰهُ مَوْجٌۭ مِّن فَوْقِهِۦ مَوْجٌۭ مِّن فَوْقِهِۦ سَحَابٌۭ ۚ ظُلُمَٰتٌۢ بَعْضُهَا فَوْقَ بَعْضٍ 
إِذَآ أَخْرَجَ يَدَهُۥ لَمْ يَكَدْ يَرَىٰهَا ۗ وَمَن لَّمْ يَجْعَلِ ٱللَّهُ لَهُۥ نُورًۭا فَمَا لَهُۥ مِن نُّورٍ

"Or the (state of a disbeliever) is like the darkness in a vast deep sea, overwhelmed with waves topped by waves, topped by dark clouds, (layer of) darkness upon darkness: if a man stretches out his hand, he can hardly see it! And he for whom Allah has not appointed light, for him there ia no light."

  This Verse is in accordance with these facts, as they affirm that the deepsea is mostly covered by clouds. Tte word "like the darknes" indicates that there is no vision, and that is also supported by the word "in the vast deef sea (fi bahrin lujjiy)". Lujjiy refert to that which  is very dark and very deep. The fish at that depth have no eyes; rather they are uquipped with bioluminescence, as montioned in the Encyclopaedia Britanica. This what is mean when Allah,  the Almighty, says: '' And he for whom Allah hes notappointed light, for him there is no light." These fish are able to find their way by means of light-producimg fleshy growts that Allah, the Exalted, has created in their bodies. The sea floor slopes and change colour gradually, fading to blue before dissappearig altogether as the depth increases. As the light spectrum decreases as the depth increases, new type of darkness develop which prevent seeing some colour of the spectrum.

     Hence, Allah, the Exalted, says ''Zulumaat"  (usually translated as"darkness" although it is a plural form, e.i., darkness), and He did not say "Zulmah" (singular). He said: " (layer of) darkness upon darkness" (lit. darknesses one above another).

 Dr. Williams Hay notedthat fisherman are able to use the differences in the color of water to determine the depth with remarcable precision. As mentioned earlier, nowadays the simplest scientific tool that is used to measure  the depth to which light penetrates the ocean waters Secchi disk, which it becomes imposible to see it, which is taken as a set point.