Water waves approach an aperture (an aperture is the opening in the barrier). Th

Question

Water waves approach an aperture (an aperture is the opening in the barrier). The resulting patterns are shown for two different cases, A and B, in which the aperture size is varied while the wavelength is held constant. Which one of the following statements concerning these cases is true? A) Neither figure shows diffraction. In both cases, the wavelength is much smaller than the aperture. B) Diffraction occurs in A, but not in B because the wavelength in A is much smaller than the aperture. C) Diffraction occurs in B. but not in A because the wavelength in B is much smaller than the aperture. D) Both figures show diffraction. In both cases, the wavelengths arc approximately the same size as the aperture. E) Diffraction occurs in B. but not in A because the wavelength in B is approximately the same size as the aperture.

Explanation / Answer

E) Diffraction occurs in B, but not in A because the wavelength in B is approximately
the same size as the aperture.

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