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Light Year

Distance trav...

Question

Distance travelled by light in one year is called __________.

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Solution

Distance travelled by light in one year is called A light-year.
A light-year the maximum distance light can travel in a year. Light travels at a speed of around $300, 000 k m / s$ .. So it can travel around $10 t r i l l i o n k i l o m e t r e s$ in a year.
A light-year is $9, 500, 000, 000, 000 k i l o m e t r e s$ in length.

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Q. Question no 4. If the velocity of light is 3.0

\times 10^{8}

metres per second, calculate the distance travelled by light in a light year and express it in standard form.
[Hint: One light year = Distance travelled by light in a year.]

Q. Assertion (A): Light year is the unit of time.

Reason (R): Light year is the distance travelled by light in vacuum in one year.

Q. A light year is the distance travelled by light in one year. How many kilometers does light travel in a year assuming speed of light is

3 \times 10^{8} m s^{- 1}

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Q. Assertion :A light-year is a distance that light travels with velocity of

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