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