engineering physics MCQ #535

engineering physics MCQ #535

1. Question 1

   Q1. The wavelength of the second line of Balmer series is given by

   • A) 1 / λ = R * (1 / 2² - 1 / 4²)
   • B) 1 / λ = R * (1 / 3² - 1 / 5²)
   • C) 1 / λ = R * (1 / 2² - 1 / 3²)
   • D) 1 / λ = R * (1 / 4² - 1 / 6²)

   Answer: 1 / λ = R * (1 / 2² - 1 / 4²)

   Explanation: For the second line of Balmer series, n1 = 2 and n2 = 4, so 1 / λ = R * (1 / 2² - 1 / 4²).