Visible light section in oceans

Photic Zone

Visible light cannot penetrate deep waters. The zone which humans can see unaided is called the photic zone:

It extends from the surface down to a depth where light intensity falls to one percent of that at the surface, called the euphotic depth. Accordingly, its thickness depends on the extent of light attenuation in the water column. Typical euphotic depths vary from only a few centimetres, in highly turbid eutrophic lakes, to around 200 meters in the open ocean. It also varies with seasonal changes in turbidity.
Wikipedia, Photic Zone, 2018

So humans can only see unaided from few centimeters to 200m. However this was revealed in the Quran long before it was discovered:

[Quran 24.40] Or like the depths of darkness in a vast deep ocean, overwhelmed with waves topped by waves, topped by clouds: depths of darkness, one above another: if a man stretches out his hand, he will not see it! If Allah does not give light to a person he will not have light!

The Quran says that it is so dark down there you cannot see your own hand.

How could an illiterate man who lived 1400 years ago have known that light cannot reach deep waters?  

Miracles Of Quran

The Quran (Koran, the book of Islam) contains scientific knowledge that could not have been known 1400 years ago. It ranges from basic arithmetics to the most advanced topics in astrophysics. You are invited to go through those miracles and judge for yourself.

STUDY OF THE EARTH

Geology

Coal, Landslide, Weathering - Erosion, Porous Rocks, Mass Extinction, Steam Explosions, Mountains, Internal Waves, Earth, Pumice, Photic Zone, Tectonics, Dead Sea, Sinkhole, Volcano, Shorelines, Minerals, Hydrothermal Vents, Freshwater, Fire Whirl, Rocks Crack, Subduction, Fault Lines, Earthquake, Soil Expansion, Flash Flood.

SCIENCE OF LIVING ORGANISMS

Biology

Fetal Development, Honey, Cholesterol, Meiosis, Antioxidants, Fats, Hypoxia, Miscarriage, Gardens, Photosynthesis, White Hair, Pollination, Lightning Strike, Inner Ear, Cataracts, Vision, Bones, Milk, Brain Functions, Evolution, Honey Bees, Human Senses, Frost, Gender, Eye Pupil, Womb, Fingerprints, Skin Nerves, Fasting, Breastfeeding, Eardrum, Fetus, Fluorescence, Human Embryo, Bedsores, Perspiration, Bacteria, Plant Stress.

SCIENCE OF Quantity, SPACE, AND CHANGE

Mathematics

Distance, Prime Numbers, Pi, Arithmetics, Relational Algebra, Base-19.

study of the past

History

Paper Money, Hieroglyphs, Digital Books, Calendar, Moses, Pharaoh's Mummy, Haman, Karnak Temple, Pharaoh, Flight, Noah, Dead Sea, Pompeii, North, Petra, Water Dam.

ANIMAL SCIENCE

Zoology

Raptors, Spider Web, Ants, Honey Bees, Colonies, Animal Languages, Mosquito, Crow, Nocturnal Animals, Housefly.

STUDY OF THE ATMOSPHERE

Meteorology

Sea Breeze, Orographic Effect, Wind, Volcanic Gases, Mass Extinction, Microburst, Cloud Seeding Dew, Shorelines, Fire Whirl, Freshwater, Atmospheric Pressure, Flash Flood, Weight Of Clouds.

SCIENCE OF CELESTIAL OBJECTS

Astronomy

Sunlight, Full Moon, Meteorites, Exoplanets, Planetary Orbits, Magnetosphere, Moonlight, Day, Multi-Star System, Iron, Starlight.

SCIENCE OF ELEMENTS AND COMPOUNDS

Chemistry

Viscosity, Superionic Water, Photosynthesis, Volcanic Gases, Mass Extinction, Bones, Steam Explosions, Internal Waves, Pyramids, Hydrogen, Water Stratification, Cloud Seeding, Fluorescence, Pompeii, Rust.

SCIENCE OF MOTION AND BEHAVIOR THROUGH SPACE AND TIME

Physics

Work, Light, Atoms, Pairs, Speed Of Light, String Theory, Rayleigh Scattering, Terminal Velocity, Time Relative, Wormholes, Pulsars, Gravity, Spacetime, Armor Peircing, Gravitational Waves, Sonic Weapons, Mass, String Theory, Equivalence Principle, Red Shifting.

SCIENCE OF THE ORIGIN AND EVOLUTION OF THE UNIVERSE

Cosmology

Shape Of Universe, Age Of Universe, Seven Heavens, Big Bang, Expanding Universe, Sound Waves, Isotropy, Primordial Smoke, Dark Energy, Galaxy Filaments. Dark Energy

Please link to

miracles-of-quran.com