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Topic - How does light travel in space?

marcusinbristol - on 06 Dec 2012
Hi, I hope you can help. My little girl tonight asked about the stars in the night sky and why we could see them on earth if they were really so far away. I don't know the answer but I hazarded a guess that light waves travel through a vacuum so they just keep going in a straight line.

Then perhaps sensing she had me on the ropes we talked about if we were in space with a torch and we turned it on for a couple of minutes what would happen to that light. I thought it might just keep travelling trough space as a light wave forever but I don't really know. I've promised her an answer by breakfast. She also wants to know if she were on the far side of space and was waiting for the light to arrive from the torch what would it be like.

Help.

Marcus
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