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What is the order of magnitude of 1 light year expressed in metre?

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What is the order of magnitude of 1 light year expressed in metre?
A. `10^(14)`
B. `10^(15)`
C. `10^(16)`
D. `10^(17)`
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Correct Answer - c
1 Light Year = 1 Year `xx` Velocity of light
`=365xx24xx60xx60xx3xx10^(8)` metre
`=9.461xx10^(15)m`
`therefore` The order of magnitude is `10^(16)`m.
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