Question

the distance of galaxy from the earth is
$5.6 \times {10}^{25}$
assuming the speed of light to be
$3 \times {10}^{8} {ms}^{ - 1}$
find the time taken by light to travel this distance​

Answer 1

Answer:

Speed of light, c = 3 x 10

8

m s

−1

Time taken by light to reach the earth from the galaxy is

t=

3×10

8

ms

−1

10

25

m

=3×10

16

s