Q 11-14-006NEETJEE MainEasy
For the wave $y = 5\sin 2\pi\left(\dfrac{t}{0.04} - \dfrac{x}{40}\right)$, with $x$ and $y$ in cm and $t$ in s, the wavelength and frequency are
Answer: (B) $40$ cm and $25$ Hz
Compare with $y = A\sin 2\pi\left(\dfrac{t}{T} - \dfrac{x}{\lambda}\right)$: $\lambda = 40$ cm and $T = 0.04$ s, so $f = 25$ Hz.
Solution by Sreeraj P, M.Sc Physics