Which of the following is not true for this progressive wave $y = 4\sin 2\pi \left( {\frac{t}{{0.02}} - \frac{x}{{100}}} \right)$ where $y$ and $x$ are in $cm$ & $t$ in $sec$
  • AIts amplitude is $4 cm$
  • BIts wavelength is $100 cm$
  • CIts frequency is $50$ cycles/sec
  • DIts propagation velocity is $50 \times {10^3}\,cm/sec$
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