關於 E=mc^2

Certainly, in fact, this is a very common nuclear process called "pair production", which is the production of an elementary particle and its anti-particle, of the same mass but opposite electrostatic charge, from a high energy photon, usually in the gamma ray range. In this case, the two particles are an electron and an anti-electron (more commonly known as a positron, whose rest mass is the same as that of an electron but whose charge is +e ).

Because the Law of Conservation of Momentum must be satisfied during the pair-production process, pair production cannot take place in empty space. The momentum of the initial photon must be absorbed by something. In this regard, the photon momentum can be absorbed by an atomic nucleus, which is thousands of times more massive than an electron or positron and can therefore absorb momentum without absorbing much energy. Consequently, pair production is observed when high-energy gamma rays enter a solid, where a high density of atomic nuclei is present.

You may refer to the following web-page for more details:

http://physics.pdx.edu/~egertonr/ph311-12/pair-p&a.htm

系可以的，但系用咩方法我就唔知道。

其实你可以諗下，如果只可以將質量轉成能量，而唔可以將能量轉換質量。

其實咁樣長遠，所有野都會變成能量。

愛因斯坦哩條公式叫做質能轉換公式，代表質量和能量某程度上的等價，

亦可以互相轉換的！

我覺得你個問題好怪

[正粒子同負粒子墥埋一齊就會釋放出能量]同E=mc^2有咩關係

當中唔會有質量的虧損


Anyway,[將能量變成物質(粒子)]當然可以,因為物質只係能量的種形式....

2010-02-07 19:44:21 補充：
物質只係能量的其中一種形式.

理論上可以的。
任何化學作用或核聚變，都可以雙向的。只要有足夠的能量和方法，能量是可以變成物質。

呢個問題就好似問緊可唔可以將汽油轉做石油一樣-.-(我覺得係唔可以)