Question

The equation of a stationary wave is Y = 10 sin$sin\frac{\pi x}{4}cos20\pi t$. The distance between two consecutive antinodes in meters is -

• A. 4
• B. 2
• C. 5
• D. 8

Answer 1

Answer: (A)

4

$\begin{array}{c}Y=10\sin \frac{mn}{2}\cos 20Mt\\ K=\frac{2M}{\lambda }=\frac{M}{2}=\frac{2M}{1}\\ Hence,\\ \lambda =4\\ \therefore optionAiscorrect.\end{array}$