The Qur’an (Surah An‑Nur 24:40) describes the deep seas as places of layered darkness, covered by waves upon waves, and clouds above them—an image that modern oceanography confirms with the discovery of internal waves beneath the surface waves.

Qur’anic Verse

Allah says 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 highlights:

• Darkness in deep seas (beyond 200 meters, sunlight disappears).
• Multiple layers of waves (surface waves and unseen internal waves).
• Clouds above adding further darkness.

Scientific Explanation

Modern science has confirmed details that align with this verse:

• Darkness in the deep ocean:
  • At depths of 200 meters, almost all light is absorbed.
  • Below 1000 meters, there is complete darkness.
• Internal Waves:
  • These occur at boundaries between water layers of different densities (due to temperature or salinity).
  • They move like surface waves but are hidden beneath the ocean surface.
  • Internal waves can break and travel long distances, often in complete darkness.

Significance in Islam

• Scientific Miracle: The Qur’an mentioned internal waves and deep‑sea darkness 1400 years ago, long before submarines or oceanographic tools existed.
• Spiritual Lesson: The verse uses this imagery to describe the state of unbelievers—lost in layers of darkness without divine guidance.
• Faith and Reflection: Just as light disappears in the deep sea, guidance disappears without Allah’s nur (light).

Key Takeaways

• The Qur’an’s description of waves upon waves refers to both surface waves and internal waves.
• The darkness of the deep sea is scientifically accurate and only recently discovered.
• This verse is both a scientific insight and a spiritual metaphor about the need for Allah’s guidance.

In short: The Qur’an’s reference to deep seas, internal waves, and layered darkness (24:40) is a striking example of how divine revelation anticipated modern oceanographic discoveries, while also serving as a powerful metaphor for spiritual blindness without faith.