- A. 0.3 Seconds
- B. 1.3 Seconds
- C. 3.1 Seconds
- D. 4.13 Seconds
The Correct Answer is: B
Explanation
sunlight takes about 8 minutes and 20 seconds to reach Earth. The moon, being much closer to Earth, takes significantly less time. Moonlight reaches Earth in approximately 1.3 seconds.
Here’s the breakdown:
Sunlight travels at a speed of approximately 299,792 kilometers per second (186,282 miles per second).
The distance between the Sun and Earth varies throughout the year due to Earth’s elliptical orbit. On average, this distance is around 149.6 million kilometers (93 million miles).
Using the speed of light and the average Sun-Earth distance, we can calculate the travel time for sunlight:
Time = Distance / Speed
Time = 149.6 million km / 299,792 km/s (converted to kilometers per second for consistency)
Time ≈ 501 seconds (which is 8 minutes and 21 seconds, close enough to 8 minutes and 20 seconds for most purposes)
The moon, however, is much closer to Earth, with an average distance of about 384,400 kilometers (238,855 miles).
Using the same formula with the moon’s distance:
Time = 384,400 km / 299,792 km/s
Time ≈ 1.28 seconds (which is approximately 1.3 seconds)
Therefore, while sunlight takes over 8 minutes to travel to Earth, moonlight takes a mere 1.3 seconds due to the vast difference in their distances.
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