A-LevelPhysicsSuperpositionOct/Nov 2021Paper 1 Q241 Mark
A sound wave from a loudspeaker is reflected back along its original path by a reflector. A microphone is initially at point X where the sound intensity is a minimum, as shown. [Figure 24.1] The microphone is moved towards the reflector and passes through four more intensity minima until reaching a fifth minimum at point Y. The distance XY is 70.0 cm. What is the wavelength of the sound?
A11.7 cm
B14.0 cm
C23.3 cm
D28.0 cm
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The correct answer is D. This question tests the candidate's understanding of superposition within the Physicssyllabus. The examiner's mark scheme requires...
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