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Physics, 27.06.2019 12:00 sovprints

Which statement about how light travels is true? a light waves need a medium to travel, and they travel at the same speed even if the light source is moving. b light waves can travel in a vacuum and travel at a constant speed even if the light source is moving. c light waves can travel in a vacuum and will travel faster if the light source is moving forward. d light waves need a medium to travel, and they travel faster if the light source is moving forward.

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