Your brother is insisting that you'll never hear a sound produced behind a barrier wall at the end of your yard. you notice that the door within the wall is open and quickly explain to him that the sound will be able to reach you due to
a. focusing.
b. diffraction.
c. reverberation.
d. diffusion.

Correct answer choice is :

B) Diffraction.

Explanation:

Diffraction applies to several aspects that happen when a wave meets a barrier or a split. It is described as the bending of waves about the corners of a barrier or opening into the area of the geometrical obscuration of the barrier. Diffraction is the bending of waves around obstacles and openings. The amount of diffraction raises with rising wavelength.

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