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Internal waves & Layer of darkness Quran and Science

📖Quran 24:40
Or ˹their deeds are˺ like the darkness in a deep sea, covered by waves upon waves, topped by ˹dark˺ clouds. Darkness upon darkness! If one stretches out their hand, they can hardly see it. And whoever Allah does not bless with light will have no light!

Internal waves are gravity waves that oscillate within a fluid medium, rather than on its surface. To exist, the fluid must be stratified: the density must decrease continuously or discontinuously with depth/height due to changes, for example, in temperature and/or salinity. 

Read more: Wikipedia, Internal Wave, 2018