Transitions Between Levels — Practice Quiz

Question 1

Photon emitted in n=3 → n=1 transition of hydrogen has energy:

Accepted Answer

12.09 eV

Answer

1.89 eV

Answer

10.2 eV

Answer

13.6 eV

Question 2

Lifetime of typical 'allowed' excited atomic state:

Accepted Answer

10⁻⁸ s

Answer

10⁻¹⁵ s

Answer

10⁻³ s

Answer

1 s

Question 3

An atom in the ground state can absorb a photon to:

Accepted Answer

Be ionised or excited (if energy matches)

Answer

Emit a higher-energy photon

Answer

Slow down

Answer

Become heavier

Question 4

An atom in the n=4 state can emit a MAXIMUM of how many distinct photons before reaching the ground state?

Accepted Answer

6

Answer

3

Answer

4

Answer

12

Question 5

Stimulated emission is the basis of:

Accepted Answer

Lasers

Answer

Photoelectric effect

Answer

Black-body radiation

Answer

Photochemistry