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Which statements describe diffraction? Check all that apply.

Diffraction occurs when waves interact with a barrier.
Diffraction occurs because waves pass into a new medium.
Diffraction occurs when waves interact with a gap.
Diffraction occurs when waves bounce back in the reverse direction.
Diffraction occurs in any type of wave—mechanical or electromagnetic.

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AL2006
-- Diffraction occurs when waves interact with a barrier.
-- Diffraction occurs when waves interact with a gap.
-- Diffraction occurs in either type of wave—mechanical or electromagnetic.

Answer: Diffraction occurs when waves interact with a gap.

Diffraction occurs in any type of wave—mechanical or electromagnetic.

Explanation:

The phenomenon of light to bend around a small obstruction in its path is known as diffraction. Diffraction occurs for any type of waves- transverse or longitudinal i.e. for mechanical or electromagnetic waves.

When the medium changes- refraction occurs. Waves reflect back from a barrier. Diffraction occurs when the wavelength of the wave is comparable to the size of the gap. The wave bends around the corners of the gap.

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