The wavelength of the first line of the Balmer series is 656 nm. What is the wavelength of the second line?
Q1. The wavelength of the first line of the Balmer series is 656 nm. What is the wavelength of the second line?
Answer: 486 nm
Explanation: Using the Rydberg formula: 1/λ = R (1/2² - 1/n²), for n = 4, 1/λ = R (1/4 - 1/16), λ = 486 nm.