How many seconds does it take for reflected moonlight to travel to Earth___________seconds?
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Answer: B. 1.3 seconds
Explanation
Light reflected from the moon takes approximately 1.3 seconds to travel across the distance to Earth. Dividing the average Earth-Moon distance by the speed of light yields this brief travel duration. Radio signals and reflected solar photons share this exact same transit time through space. The Moon orbits Earth at an average distance of roughly three hundred eighty-four thousand kilometers. Light travels through the vacuum of space at a constant speed of approximately 300,000 kilometers per second. Astronomical distances are often measured in light-seconds to help conceptualize vast cosmic scale.
Zero point three seconds is too fast and underestimates the actual distance between Earth and the Moon. Two point three seconds is too long and corresponds to a distance much greater than the lunar orbit. Three point three seconds represents a light travel time corresponding to distances well beyond the Moon.
- Subject
- Everyday Science
- Category
- Everyday Science
- Topic
- —
- Difficulty
- medium
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