Page 184 - text book form physics kssm 2020

Characteristics of Waves
Figure 5.12 shows the profi le of a water wave in a pond. What changes can you observe as the
wave propagates across the water surface?
Direction of propagation
Changes in wave profi le

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Figure 5.12 Profi le of water wave

To answer this question, you need to know the defi nition of terms related to waves.
Table 5.1 Defi nition of terms related to waves

Term Defi nition File
Amplitude, A Maximum displacement of a particle from its • Equilibrium position is the
equilibrium position
original position of the
Period, T Th e time taken by a particle to make one complete particle before a
oscillation or by a source to produce one complete system oscillates.
cycle of wave • For waves of frequency, f :
1
f = —
Frequency, f Number of complete oscillations made by a particle T
or number of cycles of wave produced by a source • Displacement is the distance
in one second of a particle from the
equilibrium position.
Wavelength, λ Distance between two consecutive points in phase

Wave speed, v Distance travelled per second by a wave profi le

Carry out Activity 5.4 to explain the defi nition of terms related to waves.

Activity 5.4 ICS ISS

Aim: To defi ne terms related to waves

Instructions:
1. Work in groups. Waves
2. Scan the QR code and watch the video about waves.
3. Gather information from websites which explain the
defi nition of terms related to waves.
4. Present your fi ndings in the form of an interesting http://bt.sasbadi.com/p4178b
multimedia presentation.

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