Question text
26 Which statement gives a condition that enables diffraction to occur? A A source of waves moves towards a stationary observer. B A wave is partially blocked by an obstacle. C Two coherent waves are superposed. D Two waves are travelling through the same part of a medium in opposite directions.
26 Which statement gives a condition that enables diffraction to occur?
A A source of waves moves towards a stationary observer.
B A wave is partially blocked by an obstacle.
C Two coherent waves are superposed.
D Two waves are travelling through the same part of a medium in opposite directions.
Select your answer: