Question

The galaxy at a distance 6.2× 10 light years is moving
away from the earth with a speed of 86 x 105 m/s.
Calculate the age of the universe.
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Answer 1

Answer:

The Time or age is 2.05*10⁶ yrs.

Explanation:

Distance = 6.2*10 ly

1 ly = 9.46*10¹⁵ m

Distance in m = [9.46*6.2]* 10¹⁺¹⁵ m

= 58.65*10¹⁶ m

Speed = 86*105 m/s

= 9030 m/s

Time = Speed = Distance/Time

= 9030 = 58.65*10¹⁶/T

= 9030T = 58.65*10¹⁶

= T = 58.65*10¹⁶/9030 s

= T = 6.49*10¹³ s

or,

= 1 yr = 3.153*10⁷ s

= No. of years = [6.49/3.153] * 10¹³⁻⁷ yrs

= 2.05*10⁶ yrs

Hope this helps.