JEE Main202124 Feb 2021Evening ShiftPhysicsWaves and SoundActual
Which of the following equations represents a travelling wave?
Options
- Ay = A sin 15 x - 2 t
- By = Ae x cos ω t - θ
- Cy = Ae - x 2 v t + θ
- Dy = A sin x   cos ω t
Correct answer
A. y = A sin 15 x - 2 t
Step-by-step solution
The given function should be in the form of f x ± v t . So, for travelling wave y should be linear function of x and t and should be finite and continuous for all values of t . y = A sin 15 x - 2 t → linear function in x and t .