Question

Express the 1 light year in terms of metre and what it is order of magnitude

Answer 1

light year :- The distance traveled by the light in one year is called a one light year.

1 ly = 3×10^8 × 60 × 60 × 24 × 365.25 m

1 ly = 946728 × 10^10 m

1 ly = 9.46728 × 10^15 m.

here , ly ----> light year

Answer 2

Answer:

order of magnitude of light year = 16

Explanation:

one light year is the distance travelled by light in one year.

speed of light, c = 3×10^8 m/s

t = 1 year = 365.25×24×60×60 s

1 light year = c×t

= 3×10^8×365.25×24×60×60 m

= 9.467×10^15 m

= 0.9467×10^16 m

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