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6 June, 00:52

The speed of light in a vacuum is 2.998 x 10⁸ m/s. Calculate its speed in km/hr.

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  1. 6 June, 01:22
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    1.07928 x 10⁹ km

    Explanation:

    How many seconds are there in an hour?

    60 * 60 = 3600

    If it takes light one second to travel 2.998 x 10⁸ m, then much distance would teh light cover in 3600 seconds?

    2.998 x 10⁸ m * 3600 = 1.07928 x 1012 m

    1000 m = 1 km

    Therefore; 1.07928 x 10¹² m / 1000 m

    = 1.07928 x 10⁹ km
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