Question 10: Atoms & Nuclei

Question

Assertion : In He-Ne laser, population inversion takes place between energy levels of neon atoms.
Reason : Helium atoms have a metastable energy level.

Accepted Answer

The transition in He-Ne Laser is shown
below.
An electric discharge is the gas pump the helium atom to higher energy states. These He atoms collide with the ground state atoms and excite to higher states and produce population inversion causing a directional photon beam.

Answer

Both assertion and reason are true and reason is the correct explanation of assertion

Answer

Both assertion and reason are true but reason is not the correct explanation of assertion

Answer

Assertion is true but reason is false

Answer

Both assertion and reason are false.

Atoms & Nuclei

Assertion : In He-Ne laser, population inversion takes place between energy levels of neon atoms. Reason : Helium atoms have a metastable energy level.

Choose the correct answer: