God has said in the Qur’an:
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. Darknesses, one above another. If a
man stretches out his hand, he cannot see
it.... (Qur’an, 24:40)
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.1 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 the oceans, such as at a depth of
200 meters.
Scientists have recently discovered this darkness by means of
special equipment and 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, above which are clouds....”, that the deep
waters of seas and oceans are covered by waves, and above these
waves are other waves. It is clear that the second set of waves are
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.”1 (see figure 16). The internal waves cover the
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.)
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.1
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. Darknesses, one above another. If a
man stretches out his hand, he cannot see
it.... (Qur’an, 24:40)
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.1 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 the oceans, such as at a depth of
200 meters.
Scientists have recently discovered this darkness by means of
special equipment and 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, above which are clouds....”, that the deep
waters of seas and oceans are covered by waves, and above these
waves are other waves. It is clear that the second set of waves are
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.”1 (see figure 16). The internal waves cover the
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.)
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.1
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