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Identify the wave number (k) from the given wave equation.

Physics

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Step-by-step solution

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To find the phase difference between two layers of the wave, we first need to identify the wave number from the given equation and then use the formula for phase difference.

  1. Identify the wave number (kk) from the given wave equation.

    The general equation for a progressive wave is given by:

    y=ASin(ωt−kx)y = A\text{Sin}(\omega t - kx)

    The given equation is:

    y=10Sin(1000πt−πx34)y = 10\text{Sin}\left(1000\pi t - \frac{\pi x}{34}\right)

    By comparing the two equations, we can see that the wave number kk is:

    k=π34 rad/cmk = \frac{\pi}{34} \text{ rad/cm}
  2. Calculate the phase difference (Δϕ\Delta \phi).

    The phase difference Δϕ\Delta \phi between two points separated by a distance Δx\Delta x is given by the formula:

    Δϕ=kΔx\Delta \phi = k \Delta x

    We are given the separation distance Δx=153 cm\Delta x = 153 \text{ cm}.
    Substitute the values of kk and Δx\Delta x into the formula:

    Δϕ=(π34 rad/cm)×(153 cm)\Delta \phi = \left(\frac{\pi}{34} \text{ rad/cm}\right) \times (153 \text{ cm}) Δϕ=153π34 radians\Delta \phi = \frac{153\pi}{34} \text{ radians}
  3. Convert the phase difference from radians to degrees.

    We know that π radians=180∘\pi \text{ radians} = 180^\circ.
    So, to convert Δϕ\Delta \phi to degrees, we multiply by 180∘π radians\frac{180^\circ}{\pi \text{ radians}}:

    Δϕ=153π34×180∘π\Delta \phi = \frac{153\pi}{34} \times \frac{180^\circ}{\pi} Δϕ=153×180∘34\Delta \phi = \frac{153 \times 180^\circ}{34}

    Now, perform the multiplication and division:

    Δϕ=27540∘34\Delta \phi = \frac{27540^\circ}{34} Δϕ=810∘\Delta \phi = 810^\circ
  4. Find the equivalent phase difference within 0∘0^\circ to 360∘360^\circ.

    A phase difference of 810∘810^\circ means the wave has completed multiple cycles. To find the equivalent angle within a single cycle (0∘0^\circ to 360∘360^\circ), we subtract multiples of 360∘360^\circ:

    810∘=2×360∘+90∘810^\circ = 2 \times 360^\circ + 90^\circ

    So, the phase difference is equivalent to 90∘90^\circ.

    Comparing this result with the given options:
    A. 270∘270^\circ
    B. 45∘45^\circ
    C. 90∘90^\circ
    D. 180∘180^\circ
    E. No Correct Option

    The calculated equivalent phase difference matches option C.

    The final answer is C. 900\boxed{\text{C. } 90^0}.

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