Waves

________ is the change in direction of a wave due to a change in its speed when a wave passes from one medium to another.

One 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Two 17 18 19 20 21 22 23 24 25 26 27
Three 28 29 30 31 32 33 34 35 36 37 38
  
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