Calculating the Speed of Light Around the Earth in One Day

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SUMMARY

The discussion centers on calculating how many times a light beam can travel around the Earth in one day, given the speed of light at 299,800,000 m/s and the Earth's radius of 6,370 km. Participants confirm that the first step is to calculate the circumference of the Earth, which is essential for determining the total distance light can cover in a 24-hour period. The calculation involves using the formula for circumference (C = 2πr) and then dividing the total distance light travels in a day by this circumference.

PREREQUISITES
  • Understanding of basic physics concepts, specifically speed and distance.
  • Familiarity with the formula for circumference (C = 2πr).
  • Knowledge of unit conversions between kilometers and meters.
  • Basic arithmetic skills for performing calculations.
NEXT STEPS
  • Calculate the circumference of the Earth using the formula C = 2πr.
  • Determine the total distance light travels in one day (86,400 seconds).
  • Divide the total distance by the Earth's circumference to find the number of trips.
  • Explore the implications of light speed in various scientific contexts.
USEFUL FOR

Students beginning their studies in physics, educators teaching basic physics concepts, and anyone interested in understanding the practical applications of speed and distance calculations.

filo1111
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Speed of light...question

I've just started physics and I'm having difficulty with this problem.I'd really appreciate some help with how to go about doing it!Thanks!

'The speed of light is 299800000 m/s. How many times could a light beam
travel around the Earth in one day (the radius of the Earth is 6370 km)'

Do I need to get the circumference of the Earth first?
 
Physics news on Phys.org
yup get the circumference and distance covered by light in a day
 
will try that!thanks!
 

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