Final answer:
The equation E=mc^2 represents the relationship between matter ('m') and energy ('E'), with 'c' being the speed of light in vacuum.
Step-by-step explanation:
The equation that states the relationship between matter and energy is E=mc^2, which was provided by Albert Einstein. In this equation, 'E' stands for energy, 'm' stands for mass, and 'c' is the speed of light in vacuum. This equation suggests that mass can be converted into energy and vice versa.
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