The Student Room Group

is diffraction a type of interference?

as the question says
Let us quote the infallible source, Wikipedia:

”Diffraction refers to various phenomena that occur when a wave encounters an obstacle or opening. It is defined as the interference or bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/aperture.”
No, interference occurs after diffraction between two wave fronts from different sources. The phenomenon of diffraction itself I wouldn't consider interference though.
Diffraction is the spreading out of waves when they pass through or around a gap.
Interference (generally described as superposition) occurs when two waves pass each other - the resultant displacement is the vector sum of each wave’s displacement.

Diffraction is definitely NOT a TYPE of interference.

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