Physics 101 Learning Object (Harmonic Waves)
- 2. What defines a harmonic wave? A wave generated by a source that is undergoing simple harmonic motion
- 3. Source: http://hyperphysics.phy-astr.gsu.edu/hbase/waves/funhar.html Harmonic Wave (Sinusodial Wave) ? ?
- 5. Wavelength Comment on the wavelengths of the plots.
- 6. Wavelength Comment on the wavelengths of the plots. Wavelength is decreasing from the red plot to the purple plot.
- 7. Equation Tranverse displacement of the element of the spring located at x: D(x) = A sin (kx) at t=0 Where A = amplitude k = wave number Wave number k = 2π/λ -how often a waveform repeats itself (usually in rad/m)
- 8. Wave Numbers Compare the wave numbers (k) for the waveforms on the diagram. A. k1 < k3 < k2 B. k3 < k2 < k1 C. k1 < k2 < k3 D. k2 < k1 < k3 1 2 3
- 9. Wave Numbers Compare the wave numbers (k) for the waveforms on the diagram. A. k1 < k3 < k2 B. k3 < k2 < k1 C. k1 < k2 < k3 D. k2 < k1 < k3 1 2 3 Note: Wave number is defined by how often a waveform repeats over a wavelength
- 10. Traveling Harmonic Waves Harmonic WavesEquation: Replace x with x-vt for increasing x and x+vt for decreasing x D(x,t)=A sin (k(x- vt)) or D(x,t) = A sin (k(x+vt)) v = wave speed t = arbitrary time
- 11. Question Which of the following equations does NOT describe a traveling harmonic wave? A. D (x,t) = A sin (x - 9t - 10) B. D (x,t) = A cos (x^2 - 9t) C. D (x,t) = A cos (x - 9t - 10) D. D (x,t) = A sin (x + 9t)
- 12. Question Which of the following equations does NOT describe a traveling harmonic wave? A. D (x,t) = A sin (x - 9t - 10) B. D (x,t) = A cos (x^2 - 9t) C. D (x,t) = A cos (x - 9t - 10) D. D (x,t) = A sin (x + 9t) not in the form x-vt or x+vt