Question

The equation y = 0.15 sin 5x cos 300 t, describes a stationary wave. The wavelength of the stationary wave is

• A. Zero meter
• B. 1.256 meter
• C. 2.512 meter
• D. 0.628 meter

Answer 1

Answer: (B)

1.256 meter

Answer 2

By comparing with standard equation ∴ $\frac{2\pi x}{\lambda} = 5x$

⇒ $\lambda = \frac{2}{5} \times \pi$ = 1.256 meter