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2 votes
An object moves from point A to point B to point C, then back to point B and then to point C along the line

User Brianng
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2 Answers

1 vote
Displacement. I would say this is either distance or displacement. Depending on what they want you to work out.
User LittleAlien
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4 votes

Answer:

Rectilinear propagation of light

User Skymt
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