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An electron with kinetic energy E eV collides with a hydrogen atom in the ground state. The collision is observed to be elastic for:
Option: 1
$0< E< \infty$

Option: 2
$0< E< 10.2eV$

Option: 3
$0< E< 13.6 eV$

Option: 4
$0< E< 3.4eV$

Answers (1)

best_answer

The hydrogen atom in the ground state will only absorb energy greater than 10.2eV. When an electron with KE, E eV collides with a hydrogen atom in the ground state, if the energy of an electron is absorbed then the collision will be inelastic. If there is no absorption of energy(i.e. E<10.2eV) then the collision will be elastic.

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Nehul

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