passwella.
Menu

JAMB Physics 2008 Question 26

Question 26

Waves

Given the progressive wave equation y=5 sin (2000 πt − 0.4x), calculate the wavelength

  1. A.12.4m.
  2. B.15.7m.
  3. C.17.5m.
  4. D.18.6m.
Show the answer and explanation

Answer: B (15.7m.)

Explanation

Compare with y = A sin(ωt − 2πx/λ): 2π/λ = 0.4, so λ = 2π ÷ 0.4 = 15.7 m.