Physics · May / June 2020 · Paper 42 · Question 5
0625
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The question as text
Fig. 5.1 shows crests of a wave approaching a barrier where the wave is reflected. barrier crest direction of travel of wave Fig. 5.1
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5(a)[3]
three wavefronts parallel to each other AND same angles of reflection and incidence both by eye
two wavelengths same as original wavelength by eye
three reflected waves meet incident waves at barrier
5(b)[3]
v = fλ in any form OR (f =) v/λ
OR (f =) 1.2 / 0.36
(f =) 3.3 Hz
5(c)[2]
sound OR ultrasound
compressions
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