The diagram above illustrates the energy transitions of five electrons of an atom. Which of the transitions will produce the emission of longest wavelength?
Attached Figure / Diagram
A
I
B
II
C
III
D
IV
Verified Correct Answer: A.
Physical Principles & Numerical Solution
\lambda = \(\frac{\text{hc}}{\text{E}}\)
Since E is negative for bound states (like electrons in atoms), the less negative the value of energy, the longer the wavelength
Source: Myschool Past Questions Archive (Record #25508)