Chapter 27, Problem 2A

How long does it take for light to travel across the diameter of Earth’s orbit around the sun?

To determine

To Calculate: The time taken by the light to travel across the diameter of the Earth’s orbit around the sun

Answer to Problem 2A

  $\text{1000}\text{s}$

Explanation of Solution

Given info:

Radius of Earth’s orbit = $150million\text{ k}m$

Speed of the light = $300,000\mathrm{k}\mathrm{m}/s$

Formula used:

Diameter = 2 (radius)

  $\text{time}\text{=}\frac{\text{distance}}{\text{speed}}$

Calculation:

Diameter= $\text{2}\times \text{150 }million\text{ k}m$

= $\text{300 }million\text{ k}m$

Substituting the given values,

  $\text{t}\text{=}\frac{300,000000}{\text{300,000}}\text{=}10\text{00}\text{s}$

Conclusion:

The time is $\text{1000}\text{s}\text{.}$