Page 25 - WAVES

Exercise 6.3

1. A plane wave has a wavelength of 2 cm 2. The diagram shows a plane water wave
-1
and a velocity of 8 cm s as it moves over moving from one area P to another area Q
the surface of shallow water. When the of different depth.
plane wave moves into an area of greater
-1
depth, its velocity becomes 12 cm s . P Q
What is
a) the wavelength

b) the frequency of the wave in the area
of greater depth? 12 cm 12 cm
a) 3 cm

b) 4 Hz If the speed of water wave in P is 18 cms ,
-1
what is the speed of water wave in Q?

9 cms -1

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