A) 7.5
B) 15
C) 22.5
D) 30
Correct Answer: A
Solution :
Comparing given equation with standard equation \[y=2a\sin \frac{2\pi x}{\lambda }\cos \frac{2\pi vt}{\lambda }\]gives us \[\frac{2\pi }{\lambda }=\frac{\pi }{15}\Rightarrow \lambda =30\] Distance between nearest node and antinodes = \[\frac{\lambda }{4}=\frac{30}{4}=7.5\]
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