According to the Bohr model for the hydrogen atom, which of the following transitions will emit light with the longest wavelength?
a. from the n = 4 to n = 2 energy level.
b. from the n = 4 to n = 3 energy level.
c. from the n = 3 to n = 1 energy level.
d. from the n = 6 to n = 2 energy level.
e. from the n = 5 to n = 3 energy level.
We’re being asked to determine which transition results in the emission of light with the longest wavelength. Recall that starting from n = 1, the distance between each energy level gets smaller as shown below:
Emission is a transition process from a higher energy level to a lower energy level.
We can see that energy and frequency are directly proportional. The energy in a transition also depends on the distance between the energy levels.