: Pay close attention to dimensions and units throughout calculations to avoid common pitfalls [12].
by Saleh and Teich. It was a legendary tome, rumored among engineers to contain the foundational truths of the electromagnetic spectrum. Fundamentals Of Photonics Saleh Solution Manual
1.2 (a) ν = c / λ = (3 × 10^8 m/s) / (1.55 × 10^(-6) m) = 193.55 THz (b) T = 1 / ν = 1 / 193.55 THz = 5.17 ps : Pay close attention to dimensions and units