A) 2 unit
B) 0.3 unit
C) 0.1 unit
D) 0.2 unit Key Idea:
Correct Answer: C
Solution :
The standard equation of sound wave is \[y=a\,\sin 2\pi \left( \frac{x}{\lambda }+\frac{t}{T} \right)\] where a is amplitude, \[\lambda \] is wavelength and T is time period. Given equation of wave is \[y=0.0015\,\,\sin \,(62.8x+314t)\] ...(1) Comparing given Eq. (1) with standard wave, we get \[\frac{2\pi }{\lambda }=62.8\] \[\Rightarrow \lambda =\frac{2\pi }{62.8}=\frac{2\times 3.14}{62.8}=0.1\,\,unit\]
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