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

Options

A. `8xx10-20J`
B. `8xx10^-10J`
C. `8 J`
D. `8xx10-25 J`

Answer

d

Explanation

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`