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Unraveling the Speed of Light Mysteries in Physics

Explore questions about light's travel time, distances in space, and the concept of light-years in a comprehensive physics unit.

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Unraveling the Speed of Light Mysteries in Physics

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  1. Speed of Light Questions Physics Light Unit

  2. Numero 1 • The sun is about 150 million kilometers from earth. How long does it take light from the sun to reach earth? (The speed of light is 3x108 m/s.)

  3. Question 2 • The horsehead nebula in Orion is 1500 light-years away; the Andromeda galaxy is 2 million light-years away; the most distant quasars are over 10 billion light-years away. Is it possible to know what these objects look like right now? Why or why not?

  4. Nombre 3 • A light year is a unit of distance, the distance light travels in one year. How many kilometers long is a light-year?

  5. Answers • 1. t = 8.3 minutes • 2. No, it takes a long time for that light to reach us. • 3. 1light-year = 9.5 x 1012 km

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