Physics · May / June 2022 · Paper 42 · Question 5
0625
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Sound waves are longitudinal and electromagnetic waves are transverse.
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5(a)(i)[2]
ultrasound OR sound (frequency) above audible range
frequency > 20 kHz OR 20 000 Hz
5(a)(ii)[3]
8.7 × 10–4 m
(λ =) v / f OR v = fλ in any form
C1 (λ =) 1.3 × 103 / 1.5 × 106 OR 8.7 × 10n
C1
5(b)[2]
basic description of use e.g. X-rays for detecting broken bones
additional detail e.g. X-rays pass through soft tissue AND not through bone
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