Some open ended questions III — task. Science State Board, Class 6.

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We know that the distance between celestial bodies is calculated in terms of light year. (Ah! Unit of distance in terms of year???) Yes, it’s the distance travelled by light in one year. Now without calculator find how many kilometres light would have travelled in a year. (No Calculator). Get the speed of light from your class teacher.

Speed of light = 3 \times 10^{5} km / \sec

Calculation of one light year:

[NOTE: Write the answer up to three decimal places.]

\begin{array}{l} Time = i \times i \times i \times i \\ = i \times 10^{i} seconds \end{array}

\(Light\ year\ =\) \(\frac {Speed\ of\ light}{Time}\)
\(Light\ year\ =\) \(Speed\ of\ light\) \(\times{Time}\)
\(Light\ year\ =\) \(Time\) \(\times{Speed\ of\ light}\)

[NOTE: Write the answer up to two decimal places.]

\begin{array}{l} One light year = i \times 10^{i} \times i \times 10^{i} \\ = i \times 10^{i} kilometre \end{array}

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37. Some open ended questions III

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