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If an electron has an energy such that i...

If an electron has an energy such that its de Broglie wavelength is `5500 Å`, then the energy value of that electron is `(h= 6.6 xx 10^(-34))` Js, `m_( c) = 9.1 xx 10^(-31)` kg

A

`8xx10-20J`

B

`8xx10^-10J`

C

`8 J`

D

`8xx10-25 J`

Text Solution

Verified by Experts

The correct Answer is:
d
De-brpglie wavelength, ` lambda =h/sqrt(2mE)`'
`1/2m(h/lambda)^2`
`1/2xx9.1xx10^(-31)((6.625xx10^(-34))/(5.5xx10^(-7)))^2=8xx10^(-25)J`
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Knowledge Check

  • Both an electron and a photon have same de-Broglie wavelength of 1 . 2. Å . The ratio of their energies is nearly

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    D
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