The extent to which waves diffract when they encounter an obstacle or aperture depends on
A)the size of the aperture or obstacle.
B)the wavelength of the waves.
C)whether the wavelength is small or large relative to the size of the obstacle or aperture.
D)the speed of the waves.
E)None of these is correct.

Question

Quizplus · Accepted Answer

The extent of diffraction depends on the relationship between the wavelength of the waves and the size of the obstacle or aperture. If the wavelength is much smaller than the size of the obstacle or aperture, there will be minimal diffraction. But if the wavelength is comparable or larger than the size of the obstacle or aperture, then diffraction will be significant. The size of the aperture or obstacle, as well as the speed of the waves, can also affect diffraction, but to a lesser extent than the relationship between wavelength and size. Therefore, choice C is the best answer.

The Extent to Which Waves Diffract When They Encounter an Obstacle