Câu trả lời:
năng lượng E=hc/\(\lambda\)=m\(c^2\)=>\(\lambda\)=h/mc=h/P
động năng T=1/2m\(v^2\)
động lượng P=mv
=>P=\(\sqrt{2mT}\)
a.\(m_e\)=9,1.1\(0^{-31}\)(kg) =>P=\(\sqrt{2.9,1.10^{-31}.100.1,6.10^{-19}}=5,4.10^{-24}\)(J)
=>\(\lambda\)=\(\frac{6,625.10^{-34}}{5,4.10^{-24}}=1,2.10^{-10}\left(m\right)\)
b.\(m_p\)=1,672.\(10^{-27}\)(kg) =>P=\(\sqrt{2.1,627.10^{-27}}.100.1,6.10^{-19}\)=2,3.\(10^{-22}\) (J)
=>\(\lambda\)=\(\frac{6,625.10^{-34}}{2,3.10^{-22}}\)=2,88.\(10^{-12}\)(m)
c.\(P_e\)=\(m_e\).v=2,1877.\(10^6\).9,1.\(10^{-31}\)=1,99.\(10^{-24}\)(J)
=>\(\lambda\)=\(\frac{6,625.10^{-34}}{1,99.10^{-24}}=3,3.10^{-10}\)(m)