Page 15 - form 5 physics chapter 1

Constructive ¾ Occurs when the crests or troughs of both waves
Interference coincide to produce a wave with crests and troughs
of maximum amplitude.
Destructive
interference ¾ Occurs when crest of one wave coincide with the
trough of the other wave, thus canceling each other
with the result that the resultant amplitude is zero

The occurrence
of constructive
interference

and

destructive
interference

Antinode ¾ A point where constructive interference occurs

Node ¾ A point where destructive interference occurs.

Keys:

Maximum
crest wave
(2 crests
meet)
Zero
amplitude
(trough
meets crest)
Maximum
trough wave
(2 troughs
meet)

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