Question

To excite an electron from one orbit to another we need:

• A. A photon of energy equal to the difference between the two orbits’ energies
• B. A photon of any energy
• C. A photon of energy equal to the energy of the higher orbit of the two
• D. A photon with energy equal to the energy of the lower orbit of the two

Answer 1

The correct option is A

A photon of energy equal to the difference between the two orbits’ energies

To excite an electron from one orbit to another, we need a photon of energy equal to the difference between the two orbits’ energies.