Asked by YOUR TEACHER

Among the substances listed, in which one does a beam of light travel at the highest speed
A. Air
B. Glass
C. Plastic
D. Water

Answers

There are no human answers yet.
Answered by GPT-4o mini
A beam of light travels fastest in a vacuum, but among the substances listed (air, glass, plastic, and water), the speed of light is highest in air. Therefore, the answer is:

**A. Air**

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