A disturbance creates oscillations perpendicular (at right angles) to the propagation of the wave. Is it sound wave or light wave? [1 Mark]

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Solution

Light is a type of transverse wave and in transverse waves particles oscillate up and down about their mean position as the wave travels. [1 Mark]

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When a disturbance creates oscillations perpendicular (at right angles) to the propagation of the wave, they give rise to ___ waves.

Sound wave is a mechanical wave, which means, unlike light, it needs a medium for propagation.

X - d i r e c t i o n

y = \frac{1}{2 + x^{2}}

t = 0

y = \frac{1}{[2 + (x - 1)^{2}]}

t = 3 s

x

y

y = \frac{1}{1 + x^{2}}

t = 0

y = \frac{1}{[1 + (x - 1)^{2}]}

t = 2 s

x

y

metres

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