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Qwerty90 Group Title

If a galaxy is located 200 million light years from Earth, what can you conclude about the light from that galaxy? The light will take 200 million years to reach Earth. The light will travel 200 million kilometers per second to reach Earth. The light will travel a total of 300,000 kilometers to reach Earth. The light will travel a total of 200 million kilometers to reach Earth.

  • 2 years ago
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  1. furnessj Group Title
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    A light year is the distance light travels in a year, does that help?

    • 2 years ago
  2. Qwerty90 Group Title
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    So its the last one?

    • 2 years ago
  3. Qwerty90 Group Title
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    I mean yes I do understand it is measured as a distance and not necesarily time. But I know that sometimes it can mean time as well.

    • 2 years ago
  4. furnessj Group Title
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    No, the first! If it was 200 million light years, then light will take 200 million years to cover that distance. A 'light year' is always distance. Try working out how far it is, using how long a year is in seconds, plus the speed of light, and the formula distance = speed x time

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