If Superman were to dive into the deepest part of the ocean at the speed of light, it would have a significant and catastrophic impact, both on Superman himself and the surrounding environment. However, it's important to note that Superman, as a fictional character, possesses abilities that are not bound by the known laws of physics. Nevertheless, we can speculate on the hypothetical consequences based on scientific principles.
Energy Release: As Superman approaches the speed of light, his kinetic energy would increase dramatically. When an object moves at such high speeds, its energy increases exponentially. In this scenario, the massive amount of energy would likely be released upon impact, causing an enormous explosion.
Destruction: The impact of Superman's high-speed collision would lead to devastating consequences. The intense release of energy would create shockwaves that would propagate outward, causing massive destruction to the surrounding area, including the ocean, nearby landmasses, and possibly even triggering tsunamis.
Thermal Effects: The immense energy release would generate intense heat due to the extreme speeds involved. The water in the immediate vicinity would vaporize, and the surrounding area would experience high temperatures, potentially leading to the formation of steam, boiling, and the alteration of the surrounding ecosystem.
Pressure Waves: The speed at which Superman is diving, combined with the tremendous forces involved, would create shockwaves and pressure waves in the water. These waves would travel outward, affecting the marine life and ecosystems in the vicinity, potentially causing significant damage.
It's worth reiterating that these hypothetical effects are based on scientific principles and assumptions, considering the behavior of matter and energy at speeds approaching the speed of light. However, the actual consequences of such an event would likely be beyond our current understanding and would depend on the specific nature of Superman's powers and their interaction with the physical world.