Page 224 - text book form physics kssm 2020

Applications of Interference of Waves in Daily Life
Knowledge on interference of waves is widely used in our daily life. Figure 5.66 shows examples of
applications of interference of water, light and sound waves.

Bulbous bow generates water waves which interfere
Bulbous bow
Bulbous bow
destructively with the water waves around the hull. Th is
causes the water around the ship to become calmer and thus,
reduces water drag.

1
2
Lens
Anti-reflection coating

Coating on the surface of anti-refl ection lens causes
refl ected light to interfere destructively. Th is helps
to improve vision.

Microphone and transmitter system in head phones used
on aeroplanes produces sound waves which interfere
destructively with the surrounding noise.

Figure 5.66 Applications of interference of waves in daily life
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5.6.5