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

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

b false

confused

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