Q. The equation $y = 0.15\sin{5x\cos{300t,}}$ describes a stationary wave. The wavelength of the stationary wave is
A) Zero
B) $1.256\ metres$
C) $2.512\ metres$
D) $0.628\ metre$
Explanation
(b) On comparing the given equation with standard equation
$\frac{2\pi}{\lambda} = 5 \Rightarrow \lambda = \frac{6.28}{5} = 1.256m$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.