In physics, energy is defined as the capacity for doing work, and by “work”, we mean the working against a force. Energy can exist in numerous forms including thermal, potential, kinetic, electrical, chemical, and nuclear. Once energy is transferred, then it is appropriately designated according to its updated nature. The word was first used in this context by the physicist Thomas Young in 1800, though it did not become widespread for some time.
Theories on dark energy and theories on vacuum energy may well offer different explanations and interpretations of some of the same phenomena. Both are things that cosmologists, physicists, and astronomers are still trying to get to grips with. There are of course critics of these ideas, as is the nature of the beast with theoretical sciences. This article will take a look at what each theory is and whether there are any differences between the two concepts of mysterious energy.