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1. What would you call this?
a refraction
b. reflection
c reverberation
d. vibration
2. What type of stuff can be refracted? Choose the best answer.
a. Light
b. Sound
C. Heat
d. Anything that travels in waves
3. Light refracts when:
a. It changes speed
b. It changes from a particle to a wave
C. Its density changes
d. It encounters a solid object
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