Chem Homework 1.55 Mistake?

[Nathan Tran 4K]

(This question requires the solution manual in hand)

In the solution manual for 1.55, the way the question is solved is v/c = wavelength. However, this means frequency = speed of light times wavelength which makes no sense. Am I misinterpreting this problem, misinterpreting the solution manual, or is the solution manual wrong entirely?

[Christopher Tran 1J]

The question notes that v/c is used to represent energy with unit cm-1 (reciprocal centimeters) in infrared spectroscopy, rather than absolute wavelength.

[Nathan Tran 4K]

That makes sense, thank you!