The distance of a galaxy is of the order of `10^(25)`m. Calculate the order of magnitude of time taken by light to reach us from the galaxy.

The distance of a galaxy from Earth is of the order of 10^(25)m . Calculate the order of magnitude of the time taken by light to reach us from the galaxy.

The distance of a galaxy from Earth is of the order of 10^25 m. Calculate the order or magnitude of the time taken by light to reach us from the galaxy.

The distance of a galaxy from the earth is of the order of 10^(25)m . The time taken by light to reach the earth from the galaxy is

The distance of a galaxy from the earth is of the order of 10^(25)m . The time taken by light to reach the earth from the galaxy is

What is the order of size of out galaxy ?

The distance of a galaxy from the earth is 5.6 xx 10^(25) m. Assuming the speed of light to be 3 xx 10^8 m s^(-1) find the time taken by light to travel this distance.

The radius of our galaxy is about 3 xx 10 ^(20)m .With what speed should a person travel so that he can reach from the centre of the galaxy to its edge in 20 years of his lifetime ?

The radius of our galaxy is about 3 xx 10 ^(20)m .With what speed should a person travel so that he can reach from the centre of the galaxy to its edge in 20 years of his lifetime ?