# Given the Ground State Energy E0 = - 13.6 eV and Bohr Radius a0 = 0.53 A. Find Out How the De Broglie Wavelength Associated with the Electron Orbiting in the Ground State Would Change When It Jumps into the First Excited State. - Physics

Given the ground state energy E0 = - 13.6 eV and Bohr radius a0 = 0.53 Å. Find out how the de Broglie wavelength associated with the electron orbiting in the ground state would change when it jumps into the first excited state.

#### Solution

Ground state energy is E0 = –13.6 eV

Energy in the first excited state = E1 = (-13.6eV)/(2)^2=-3.4eV

We know that, the de Broglie wavelength λ  is given as

λ = h/p

But , p = sqrt(2mE_1)

:.lambda = h/sqrt(2mE_1)

=(6.63xx10^(-34))/sqrt(2xx(9.1xx10^(-31))xx(3.4xx1.6xx10^(-19)))

=(6.63xx10^(-34))/(9.95xx10^(-25)

λ = 6.6 x 10-10 m

Concept: Energy Levels
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