homework

1. 1. Diagram 10.1 and Diagram 10.2 show thewater and sound waves propagating towards a reflector.
(a) (i) What is meant by reflected waves?
[ 1 mark ]
(ii) With reference to Diagram 10.1 and Diagram 10.2, compare the incident and reflected angle,
wavelength, frequency, speed and direction of propagation of the reflected wave.
[ 5 marks ]
(iii) State the principleof reflection of waves.
[ 1 mark ]
(b) Discuss on how you would use the sound wave to determine the depth of the sea.
[ 3 marks ]
(c) You have been assigned as a consultant to assemble a speaker systemand to improve the acoustics of a
school hall. Using the appropriatephysics concept explain how theinstallation of thespeaker systemand
other modifications that can improve audible sound. In your explanation, elaborate on the following points:
.
(i) The arrangement of thespeakers.
(ii) Wall and floor finishing.
(iii) Power of theloud speakers
[10 marks].
Ear
Stop
watch
i r
Card board tube
Hard surface
DIAGRAM 10.2
DIAGRAM 10.1
Direction of reflected
Reflected
wavefronts
Incident wavefronts
Normal
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