B. The student's experiment most likely demonstrate electrons moving at high speed produce electromagnetic waves.
Electromagnetic waves are types of waves that do not require material medium for their propagation.
Electromagnetic waves travels in speed of light which is about 3 x 10⁸ m/s.
All electromagnetic waves such as light waves, microwaves, X-rays, radio waves, etc, are transverse waves because they travel perpendicular to the direction of their propagation.
Thus, the student's experiment most likely demonstrate electrons moving at high speed produce electromagnetic waves.
Learn more about electromagnetic waves here: https://brainly.com/question/25847009
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