d*******2 发帖数: 340 | 1 光子能量可以用plank常数乘以频率.比如可见光光子能量好象在电子伏特级.
请问电子能量是怎么回事呢?比如同步加速器里说电子能量几亿电子伏特,是速度高还是
频率高?
先谢了! | c****e 发帖数: 2097 | 2 as Dr. de Broglie
【在 d*******2 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 光子能量可以用plank常数乘以频率.比如可见光光子能量好象在电子伏特级. : 请问电子能量是怎么回事呢?比如同步加速器里说电子能量几亿电子伏特,是速度高还是 : 频率高? : 先谢了!
| M*********m 发帖数: 2024 | 3 You need to reason with numbers. The electron mass is 0.511Mev, and if you put it into the relativistic mass formula, E=mc^2=sqrt(m0^2*c^4+p^2*c^2), you can see the energy is really high with E=0.1Gev. If you consider the de-Broglie wavelength, it is h/p, you can also see it is much smaller than the charateristic wavelength of electrons. The key is to compare with the relativistic mass formula.
【在 d*******2 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 光子能量可以用plank常数乘以频率.比如可见光光子能量好象在电子伏特级. : 请问电子能量是怎么回事呢?比如同步加速器里说电子能量几亿电子伏特,是速度高还是 : 频率高? : 先谢了!
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