2) Light travels at a speed of 186,000 miles per second. If it takes light 8.0 minutes and 20.0 seconds to reach the earth from a nearby star, how far away must that star be in miles? (Which star is it?)

2) Light travels at a speed of 186,000 miles per second. If it takes light 8.0 minutes and 20.0 seconds to reach the earth from a nearby star, how far away must that star be in miles? (Which star is it?)

Horizons: Exploring the Universe (MindTap Course List)

14th Edition

ISBN:9781305960961

Author:Michael A. Seeds, Dana Backman

Publisher:Michael A. Seeds, Dana Backman

Chapter13: Galaxies: Normal And Active

Section: Chapter Questions

Problem 13RQ

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Concept explainers

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.

Question

Transcribed Image Text:2) Light travels at a speed of 186,000 miles per second. If it takes light 8.0 minutes and 20.0 seconds to reach the earth from a nearby star, how far away must that star be in miles? (Which star is it?)

Expert Solution

Step 1

Given data

*The light travels at a a speed is v = 186,000 = 1.86 × 10⁵ miles/s

*The given time taken by the light is t = 8.0 minutes, 20 s = (8.0 × 60) s +20 s = 500 s

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