A closed tube resonates first at 20 cm and next at 60 cm. The wavelength is:

  1. 40 cm
  2. 80 cm
  3. 20 cm
  4. 120 cm
Answer

B) 80 cm

Successive resonances differ by lambda2 = 40 cm. SLO P-11-D-10 · Application

Physics MCQ · More Superposition, Stationary Waves and Beats MCQs · Practise