College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Question
![**Text:**
"Light takes about 2.6 seconds to travel to the moon and back from Earth. How far away is the moon?"
**Explanation:**
To calculate the distance from the Earth to the Moon using the time taken by light, we can use the speed of light, which is approximately 299,792 kilometers per second (km/s). The total round-trip time for light is given as 2.6 seconds.
1. Calculate the one-way time by dividing the round-trip time by 2:
\[
\text{One-way time} = \frac{2.6 \text{ seconds}}{2} = 1.3 \text{ seconds}
\]
2. Use the speed of light to find the distance:
\[
\text{Distance to the Moon} = \text{Speed of light} \times \text{One-way time}
\]
\[
\text{Distance to the Moon} = 299,792 \text{ km/s} \times 1.3 \text{ s} \approx 389,729.6 \text{ km}
\]
Thus, the Moon is approximately 389,729.6 kilometers away from Earth.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F99a26a1c-f4eb-436c-b1b2-a64d9cde42dd%2F6a0ce9b8-e6f2-433f-8116-c5195e3e5119%2F4gs5c7g_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Text:**
"Light takes about 2.6 seconds to travel to the moon and back from Earth. How far away is the moon?"
**Explanation:**
To calculate the distance from the Earth to the Moon using the time taken by light, we can use the speed of light, which is approximately 299,792 kilometers per second (km/s). The total round-trip time for light is given as 2.6 seconds.
1. Calculate the one-way time by dividing the round-trip time by 2:
\[
\text{One-way time} = \frac{2.6 \text{ seconds}}{2} = 1.3 \text{ seconds}
\]
2. Use the speed of light to find the distance:
\[
\text{Distance to the Moon} = \text{Speed of light} \times \text{One-way time}
\]
\[
\text{Distance to the Moon} = 299,792 \text{ km/s} \times 1.3 \text{ s} \approx 389,729.6 \text{ km}
\]
Thus, the Moon is approximately 389,729.6 kilometers away from Earth.
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