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The distance of a galaxy from the earth ...

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

A

`3xx10^(14)s`

B

`3xx10^(16)s`

C

`3xx10^(18)s`

D

`3xx10^(20)s`

Text Solution

Verified by Experts

The correct Answer is:
B
Speed of light `c=3xx10^(8)ms^(-1)`
time taken by light to reach the earth from the galaxy is
`t=(10^(25)m)/(3xx10^(8)ms^(-1))~~3xx10^(16)`s
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