The wavelength of the first line of the Balmer series is 6563 Å. What is the wavelength of the second line?
Q1. The wavelength of the first line of the Balmer series is 6563 Å. What is the wavelength of the second line?
Answer: 4861 Å
Explanation: For Balmer series, 1/λ = R(1/2² - 1/n²). For n = 3, λ = 6563 Å. For n = 4, 1/λ = R(1/4 - 1/16), giving λ = 4861 Å.