Problem: Part AHow much time does it take light to travel from the moon to the earth, a distance of 384,000 km?Part BLight from the star Sirius takes 8.61 years to reach the earth. What is the distance to Sirius in kilometers?

FREE Expert Solution

Part A

Time, t:

t=dv

The speed of light c = 3.0 × 108 m/s

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Problem Details

Part A

How much time does it take light to travel from the moon to the earth, a distance of 384,000 km?


Part B

Light from the star Sirius takes 8.61 years to reach the earth. What is the distance to Sirius in kilometers?