If the collision of atoms will be partially elastic then the loss of some amount of energy can excite the electron to jump to higher orbits.
The elastic collision is defined as when two particles collide together then there will not be any loss of the kinetic energy of the atoms so it is called the perfectly elastic collision.
Generally, in the atoms, there is elastic collision so no loss of kinetic energy of the atoms. So the atoms will not get any energy to excite their electrons and no gain of internal energy.
Now if the collision of the atoms will be partially elastic then the loss in the kinetic energy after the collision will go to the electrons to increase the internal energy of the atom. This energy will excite the electrons to jump to higher orbits.
hence If the collision of atoms will is partially elastic then the loss of some amount of energy can excite the electron to jump to higher orbits.
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