If the velocity of light is given to be 2.99× 10to the power 8 m/s , calculate the distance tavelled by light in 1 year and express it in standard from (This distance is known as 1 light year .)
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Answer:
Speed = \frac{Distance}{Time}
⇒ Distance= Speed× Time
In this case, speed =2.99× 10^8 m/s
Time= 1 year= 365 days= 365× 86400 seconds
⇒ 31536000 seconds
∴DIstance= 2.99× 10^8× 31536000
⇒ 9.429264e+15 metre
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