engineering physics MCQ #591

The ratio of the radii of the 1st and 2nd orbits of hydrogen atom is

engineering physics MCQ #591

  1. Question 1

    Q1. The ratio of the radii of the 1st and 2nd orbits of hydrogen atom is

    • A) 1 : 4
    • B) 1 : 2
    • C) 1 : √2
    • D) 4 : 1

    Answer: 1 : 4

    Explanation: The radius is proportional to n², so r1 : r2 = 1² : 2² = 1 : 4.