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Chemistry, 12.12.2020 15:50 lizethdominguez037

What two things must occur in order for a light ray to refract when it strikes the boundary of a different medium?
A. It must strike the boundary at an angle, and its speed must
change.
B. It must strike the boundary at 45°, and its wavelength must
change.
C. It must strike the boundary at an angle, and its frequency must
change.
D. It must strike the boundary at 45°, and its frequency must change.

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