Water Waves Approach an Aperture

question 27

Multiple Choice

Water waves approach an aperture.The resulting patterns are shown for two different cases,A and B,in which the wavelength and aperture size are varied. 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 are 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.

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