Photic Zone

Upper most zone in oceans where there is visible light.

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.

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Hadith Jhoot Bolne Walo Par

*بِسْــــــمِ اللّٰهِ الرَّحْمٰنِ الرَّحِىْمِ* *اَللّٰهُمَّ صَلِّ عَلٰى سَيِّدِنَا وَ مَوْلَانَا مُحَمَّدٍ وَّ عَلٰى اٰلَهٖ وَ اَصْحَابِهٖ وَ عَلىٰ سَيِّدِنَا وَ مُرْشِدِنَا وَ مَحْبُوْبِناَ حَضْرَتِ رَاجْشَاهِ السُّونْدَهَوِيِّ وَ بَارِكْ وَ سَلِّمْ۞* Al-Qur’an:-“Beshak Jhoot Bolne Walo Par Allah Ki Laanat Hai. Reference (Surah Aal-e-Imran 3:61) Hadees No:- 1 “Nabi-e-Kareem (ﷺ) Farmate Hai:-“Jhoot Se Bacho! Bilashuba Jhoot Gunah Ki Taraf Le Jata Hai,Aur Gunah Jahannum Me Pahunchaane Wala Hai.” Reference (Sunan Abi Dawud 4989-Sahih) Hadees No:- 2 “Bahut Saare Log Muh Ke Bal Jahannum Me Phenk Diye Jaayenge, Sirf Apni Zuban (Jhooth) Ki Wajah Se. Reference (Tirmizi Shareef) Hadees No:- 3 “Nabi-e-Kareem (ﷺ) Farmate hai:- “Main Zamanat Deta Hu Jannat ke Darmiyaan 1 Ghar ki, Us Shaksh Ko Jo Mazak Me Bhi Jhoot Na Bole.” Reference (Sunan Abu Dawood 4800) Hadees No:- 5 “Laanat Aur Halaqat Hai Us Shaksh Ke Liye Jo Logo Ko Hasane Ke Liye Jhoot...

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