Question

.
4. 1 light year=
metre​

Answer 1

Answer:

1 light year = $9.4608 * 10^{15} metres$

Explanation:

1 light year = distance travelled by light in 1 year.

1 light year = speed of light * total time in a year(in sec)

1 light year = $(3 * 10^8 m/sec) * (365 * 24 * 60 * 60 sec)$

1 light year = $3 * 10^8 * 31536000 metres$

1 light year = $94608000 * 10^8 metres$

1 light year = $9.4608 * 10^7 * 10^8 metres$

1 light year = $9.4608 * 10^{15} metres$

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