Question

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11. If the speed of light is the new unit of speed and year
the new unit of time, then what will be the new unit
of length? What is its name? Given: c = 3 x 10 ms
and 1 year = 3.154 x 107 s.
Ans. 9.46 x 1015 m, 1 light year.​

Answer 1

Explanation:

Given that

The speed of light in a vacuum is unity

And we want to find the distance between the Sun and the Earth

We know that

Distance=speed×time

Speed is unity = 1 unit /sec

Time=8min and 20sec=8×60+20sec=500sec

Plug the values we get

Distance between Sun and Earth =1×500=500units

Answer 2

Explanation:

-1

11. If the speed of light is the new unit of speed and year

the new unit of time, then what will be the new unit

of length? What is its name? Given: c = 3 x 10 ms

and 1 year = 3.154 x 107 s.

Ans. 9.46 x 1015 m, 1 light year.