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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 7, Problem 23E
Textbook Problem
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Speed of Light

The Sun is 1 .5  ×  10 8 km from Earth. How long does it take light to travel from the Sun to Earth?

Interpretation Introduction

Interpretation:

The time taken by light to travel from the Sun to the Earth is to be determined.

Concept Introduction:

Electromagnetic radiation with a certain wavelength is called light.

Electromagnetic radiation is a type of energy that surrounds us. It may lie in the visible region.

Speed is the distance travelled per unit time.

The relation between speed, time and distance is as follows:

Time=DistanceSpeed

Here, distance is in meters, speed is in meter/second and time is in seconds.

Explanation of Solution

Given information: The distance of the Sun from Earth is 1.5×108km and the speed of light is 3×108m/s.

First, the relationship between kilometer and meter is as follows:

1km=1×103m1.5×108km=1.5×108km×1×103m1km=1.5×108m

Also, the relationship between minute and second is as follows:

1min=60 s3×108m/s3

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Chemistry In Focus
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