Question

3. The distance of a galaxy from the earth is 5.6 * 10^25 m.
Assuming the speed of light to be 3 * 10^8 m/s. Find the time taken by the light to travel the distance.


Class 9 ICSE
Ch - Measurements and Experimentation.

Answer 1

Hey there!

Given,

Distance = 5.6 * 10^25 m

Speed = 3 * 10^8 m/s

We know,

Distance = Speed * Time

Time = distance / speed

         = 5.6 * 10^25 / 3 * 10^8

         = 1.87 * 10^17 s

Hope It Helps You!

Answer 2

1.86×10^17 second

That was the answer of your question