Why does E=mc²? (and why should we care?)
Een tijdje geleden ben ik begonnen het boek 'why does E=mc²? (and why should we care?)' te lezen. Een zeer interessant boek waarin E=mc² wordt uigelegd voor dummies. Het boek is ,zoals aan de titel te zien, in het engels. Niet dat het uitmaakt, want het er worden geen lastige woorden gebruikt.
In de Preface kwam ik toen der tijd een leuk stukje tegen. Hierin word perfect uigelegd wat E=mc² nou eigenlijk is. Voor de dummies onder ons:
In the first half of the book we will derive the equation E=mc². By “derive,” we mean that we will show how Einstein reached the conclusion that energy is equal to mass multiplied
by the speed of light squared, which is what the equation says. Think about this for a moment and it seems like a very odd thing. Perhaps the most familiar kind of energy is the energy of
motion; if someone throws a cricket ball at your face, then it hurts when it hits you. A physicist would say that this is because the cricket ball was given energy by the thrower, and this energy
is transferred to your face when your face stops the ball. Mass is a measure of how much stuff an object contains. A cricket ball is more massive than a table-tennis ball, but less
massive than a planet. What E=mc² says is that energy and mass are interchangeable much like dollars and euros are interchangeable, and that the speed of light squared is the exchange
rate. How on earth could Einstein have reached this conclusion, and how could the speed of light find its way into an equation about the relationship between energy and mass? We do not assume
any prior scientific knowledge and we avoid mathematics as much as possible. Nevertheless, we do aim to offer the reader a genuine explanation (and not merely a description) of the science.
In that regard especially, we hope to offer something new.
Duidelijker dan dit ga je 't echt niet krijgen. Mocht je het nog niet snappen dan kan je altijd een reacties plaatsen.
Tot horens!
Een tijdje geleden ben ik begonnen het boek 'why does E=mc²? (and why should we care?)' te lezen. Een zeer interessant boek waarin E=mc² wordt uigelegd voor dummies. Het boek is ,zoals aan de titel te zien, in het engels. Niet dat het uitmaakt, want het er worden geen lastige woorden gebruikt.
In de Preface kwam ik toen der tijd een leuk stukje tegen. Hierin word perfect uigelegd wat E=mc² nou eigenlijk is. Voor de dummies onder ons:
In the first half of the book we will derive the equation E=mc². By “derive,” we mean that we will show how Einstein reached the conclusion that energy is equal to mass multiplied
by the speed of light squared, which is what the equation says. Think about this for a moment and it seems like a very odd thing. Perhaps the most familiar kind of energy is the energy of
motion; if someone throws a cricket ball at your face, then it hurts when it hits you. A physicist would say that this is because the cricket ball was given energy by the thrower, and this energy
is transferred to your face when your face stops the ball. Mass is a measure of how much stuff an object contains. A cricket ball is more massive than a table-tennis ball, but less
massive than a planet. What E=mc² says is that energy and mass are interchangeable much like dollars and euros are interchangeable, and that the speed of light squared is the exchange
rate. How on earth could Einstein have reached this conclusion, and how could the speed of light find its way into an equation about the relationship between energy and mass? We do not assume
any prior scientific knowledge and we avoid mathematics as much as possible. Nevertheless, we do aim to offer the reader a genuine explanation (and not merely a description) of the science.
In that regard especially, we hope to offer something new.
Duidelijker dan dit ga je 't echt niet krijgen. Mocht je het nog niet snappen dan kan je altijd een reacties plaatsen.
Tot horens!
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