The frequency of a spectral line is given by ν = Rc (1/n1² - 1/n2²). For Hα line, n1 = 2, n2 = 3. ν will be
Q1. The frequency of a spectral line is given by ν = Rc (1/n1² - 1/n2²). For Hα line, n1 = 2, n2 = 3. ν will be
Answer: 4.57 x 10¹⁴ Hz
Explanation: Substitute n1 = 2, n2 = 3 into ν = Rc (1/4 - 1/9) = Rc (5/36). Using Rc = 3.29 x 10¹⁵ Hz, ν = 4.57 x 10¹⁴ Hz.