The expansion of the universe is not in violation of the law of conservation of energy. While energy is indeed conserved on a local scale, the expansion of the universe occurs on a cosmological scale and is governed by the dynamics of space itself, as described by general relativity.
The law of conservation of energy states that the total energy in a closed system remains constant over time. However, this law applies to isolated systems or systems that are not subject to external influences. On cosmological scales, the universe is not a closed system. It is influenced by the dynamics of spacetime, which is governed by gravity.
According to general relativity, the expansion of the universe is driven by the presence of dark energy. Dark energy is a theoretical form of energy that is spread throughout space and has negative pressure. It behaves in a way that counteracts the gravitational attraction between matter and causes the expansion of the universe to accelerate.
As the universe expands, the energy associated with the expansion is not violating the conservation of energy because it is not coming from within the universe itself. It is an inherent property of spacetime. The expansion of the universe does not violate conservation laws because the total energy of the universe, including matter, radiation, and dark energy, remains constant over time.
It's important to note that our understanding of the universe's expansion and dark energy is based on current scientific theories and observations, which are subject to ongoing research and refinement.