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Physics 12 Instructional Master
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298 Chapter 9 Waves and Light Copyright © 2003 Nelson
Instructional Master
Refraction of Waves
LSM 9.1-5
normal
incident wave ray
higher speed(deep water)
lower speed(shallow water)
boundary
refractedwave ray
� R
� R
� i
� i
normal
incident wave ray
higher speed(deep water)
lower speed(shallow water) boundary
refractedwave ray
�i�
�i�
�R�
�R�
Figure 5(a) When water waves travel obliquely into a slower medium, the wave ray bends toward the normal. (b) If the new medium is a faster one, the wave ray bends away from the normal.
(a) (b)