A new unit length is chosen such that the speed of ligth in vaccum is unity. What is the distance between the Sun and Earth in terms of the new unit if light takes $8$ min and $20 s$ to cover this distance?

820

unit

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500

unit

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320

unit

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180

unit

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Solution

The correct option is B $500$ unit
Given: Speed of light $v = 1$
Time taken by light to reach earth, $t = 8$ min $20$ s $= 8 (60) + 20 = 500$ s
$∴$ Distance between earth and sun, $D = v t = 1 \times 500 = 500$ unit

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A new unit length is chosen such that the speed of ligth in vaccum is unity. What is the distance between the Sun and Earth in terms of the new unit if light takes 8min and 20s to cover this distance?

The correct option is B 500 unitGiven: Speed of light v=1 Time taken by light to reach earth, t=8 min 20 s=8(60)+20=500 s∴ Distance between earth and sun, D=vt=1×500=500 unit

A new unit length is chosen such that the speed of ligth in vaccum is unity. What is the distance between the Sun and Earth in terms of the new unit if light takes $8$ min and $20 s$ to cover this distance?

The correct option is B $500$ unit
Given: Speed of light $v = 1$
Time taken by light to reach earth, $t = 8$ min $20$ s $= 8 (60) + 20 = 500$ s
$∴$ Distance between earth and sun, $D = v t = 1 \times 500 = 500$ unit