To calculate the time it takes for light to travel around Earth seven and a half times, we need to know the circumference of the Earth and the speed of light.
The circumference of the Earth is approximately 40,075 kilometers (24,901 miles) at the equator.
The speed of light in a vacuum is approximately 299,792,458 meters per second (about 186,282 miles per second).
To find the time it takes for light to travel around Earth seven and a half times, we can use the formula:
Time = Distance / Speed
Distance = Circumference of Earth × 7.5
Let's calculate the time:
Distance = 40,075 km × 7.5 = 300,562.5 km
Converting kilometers to meters:
Distance = 300,562.5 km × 1,000 = 300,562,500 meters
Time = Distance / Speed
Time = 300,562,500 meters / 299,792,458 meters per second
Time ≈ 1.002 seconds
Therefore, it takes approximately 1.002 seconds for light to travel around Earth seven and a half times.