The equation of a stationary wave is \[y=0.8\cos \,\left( \frac{\pi x} – McqOptions

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1.	The equation of a stationary wave is \[y=0.8\cos \,\left( \frac{\pi x}{20} \right)\sin 200\,\pi t\], where x is in cm and t is in sec. The separation between consecutive nodes will be [MP PET 1994]
A.	20 cm
B.	10 cm
C.	40 cm
D.	30 cm
Answer» B. 10 cm

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