Light travels at a speed of approximately
A)80,500 kilometers per hour (50,000 mph).
B)300,000 kilometers per hour (186,336 mph).
C)1,000,000,000 kilometers per second (621,118,012 miles per second).
D)300,000 kilometers per second (186,333 miles per second).

Question

Quizplus · Accepted Answer

The speed of light is commonly known to be 299,792 kilometers per second or approximately 186,333 miles per second. Option D is the closest to this value. Options A and B are incorrect as they are much slower than the speed of light. Option C is also incorrect as the value given is in kilometers per second instead of kilometers per hour.

Light Travels at a Speed of Approximately