Question

3. The distance of a galaxy from the earth is 5.6 x 1025 m.
Assuming the speed of light to be 3 x 108 m s-1
find the time taken by light to travel this distance.



please do detailed sum​

Answer 1

Answer:

1.9×10^17 s

Explanation:

Given,

Distance of a galaxy from the earth = 5.6×10^25 m

Speed of light = 3×10^8 m/s

We know that,

Speed = _Distance_

Time

Time = _Distance_

Speed

= _5.6×10^25 m_

3×10^8m/s

=1.9 ×10^17 s