Quizzes & Puzzles19 mins ago
speed of light in mph
It would take a car travelling at a constant speed of 100mph, 106 years (don't worry about leap years) to reach the Sun from Earth. It takes light 8.5 minutes to make the same journey in the opposite direction.
Using the above information, what is the speed of light in mph?
If you work it out correctly, the figure you get is pretty close to the actual speed of light
in mph.
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Presumably to arrive at the 106 years you knew the distance from the earth to the sun. And it seems you knew that light takes about 8.5 minutes to reach the earth from the sun. So you knew the distance and you knew the time taken by light to cover the distance. Why not simply divide one by the other? Where does the car come in to the equation???
Eg 2450MHz x 0.122m = 2.99 x 10^8m/s
2.99 x 10^8m/s x 2.23693629 = 668620257.1mph
6.69 x 10^8mph. Which is much closer, and without the need of a long car journey.