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Consider an electron in a hydrogen atom,...

Consider an electron in a hydrogen atom, revolving in its second excited state (having radius `4.65Å` ). The de-Broglie wavelength of the electron is

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`v=c/(137n)=c/(137xx3)`
`1=h/p=h/(mv)=h/(((mxxc)/(3xx136)))=h/(mc)xx(3xx137)=9.7Å`
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