Question

Light will travel in a
Responses

curve until it enters a different medium.
curve until it enters a different medium.

broken line until it enters a different medium.
broken line until it enters a different medium.

straight line until it enters a different medium.
straight line until it enters a different medium.

zigzag until it enters a different medium.
zigzag until it enters a different medium.
Can you please explain why you think so?

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