In what region(s) of the spectrum does this series occur? Visible region is from 360 to 780 nm. — Atomic Structure Chemistry Question

💡 Solution & Explanation

The shortest wavelength in the series is the series limit at 366.97 nm (Visible). The longest wavelength is the $5 \to 4$ transition, $\lambda = 366.97 \times \frac{25}{25 - 16} \approx 1019.36$ nm (Infrared). Thus, the series spans both the visible and infrared regions. Therefore, correct answer is C.