ExpertEasy1 markMultiple Choice
AQA GCSE · Question 04.2 · Waves
Which arrow represents the wavelength of the wave?
Which arrow represents the wavelength of the wave?
Answer options:
A.
A
B.
B
C.
C
D.
D
How to approach this question
Recall the definition of wavelength. It is the spatial period of a periodic wave – the distance over which the wave's shape repeats. It can be measured between consecutive corresponding points of the same phase, such as two adjacent crests (peaks) or troughs. Identify the arrow that correctly labels this.
Full Answer
B.B✓ Correct
B
The wavelength (symbol λ) of a wave is the distance between two identical points on adjacent waves.
- Arrow B shows the distance between one peak and the next peak. This is the definition of wavelength.
- Arrow A shows the amplitude.
- Arrow C shows twice the amplitude.
- Arrow D shows the horizontal distance for half a wave cycle, which is half a wavelength.
Common mistakes
✗ Confusing wavelength with amplitude (A).\n✗ Choosing D, which is only half a wavelength.
Practice the full AQA GCSE Physics Foundation Tier Paper 2
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