Why does E=MC² use the speed of light squared as a constant?

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In summary, the conversation discusses the relationship between energy and mass, and why the constant C² is used in the equation. The conversation also raises subquestions about how Einstein came up with the equation, the significance of a squared limit, the connection to the nature of matter and energy, and the role of constants in nature. It is suggested to search for previous discussions for more information on this topic.
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nazarbaz
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I understand that energy depends on mass but why multiply it by C² and not some other constant ?
Several subquestions pops up from the previous one : how Einstein ended up with this equation ? Why a fundamental limit of nature as C should be squared (what does a squared limit mean) ? Is it related to some deep truth about the nature of matter and energy ? Is it a "model dependent" mathematical trick ? What is a constant of nature ?
 
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We get a question like this every other day (or more), you can just do a search and I'm sure you'll see a lot of threads with the answers in them.
 

FAQ: Why does E=MC² use the speed of light squared as a constant?

What does the equation E=MC² represent?

The equation E=MC² represents the relationship between mass and energy, stating that energy (E) is equal to mass (M) multiplied by the speed of light (C) squared. This equation is a fundamental principle in physics and helps explain the relationship between matter and energy.

How does E=MC² work?

E=MC² works by showing that mass and energy are interchangeable and can be converted into one another. It states that a small amount of mass can produce a large amount of energy, as long as it is multiplied by the speed of light squared. This equation is the basis for nuclear power and weapons.

Why is the speed of light squared in the equation E=MC²?

The speed of light is squared in the equation E=MC² because it is a constant value and is a very large number. When multiplied by itself, it becomes an even larger number, showing the immense amount of energy that can be produced from a small amount of mass.

How did Albert Einstein come up with the equation E=MC²?

Albert Einstein developed the equation E=MC² as part of his theory of special relativity. He proposed that the speed of light is the maximum speed at which energy and information can travel, and that mass and energy are interchangeable. By combining these ideas, he derived the famous equation.

What are the practical applications of E=MC²?

E=MC² has many practical applications, including in nuclear power, nuclear weapons, and medical imaging technology. It also helps scientists understand the energy released in stars and the atomic reactions that occur in the universe. The equation has had a profound impact on modern physics and technology.

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