The wavelength of the first line of Balmer series is given by 1 / λ = R (1 / 2² - 1 / 3²). What is λ?
Q1. The wavelength of the first line of Balmer series is given by 1 / λ = R (1 / 2² - 1 / 3²). What is λ?
Answer: 656 nm
Explanation: Calculate 1 / λ = R (1 / 4 - 1 / 9) = R (5 / 36), then λ = 36 / (5R) = 656 nm.