a) Light travels at a speed of 1.86 × 10^5 mi/sec. A light-year is the distance that light travels in 1 year. Determine the number of miles in a light-year. b) Earth is approximately 93,000,000 mi from the sun. How long does it take light from the sun to reach Earth?
Added by Magdalena W.
Step 1
Speed of light = 1.86 × 105 mi/sec Number of seconds in a year = 365 days/year x 24 hours/day x 60 minutes/hour x 60 seconds/minute = 31,536,000 sec/year Number of miles in a light-year = Speed of light x Number of seconds in a year Number of miles in a Show more…
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