Question:
A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance between the sun and the earth in terms of the new unit if light takes 8 min and 20 s to cover this distance?
A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance between the sun and the earth in terms of the new unit if light takes 8 min and 20 s to cover this distance?
Updated On: Jun 14, 2022
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The Correct Option is C
Solution and Explanation
Here,
Speed of light in vacuum,
$c = 1$ new unit of length $s^{-1}$
Time taken by light of sun to reach the earth
$t = 8$ min and $20$ seconds
$= (8 ? 60 + 20) s = 500\, s$
$\therefore\quad$ Distance between the sun and the earth
$S = ct = 1$ new unit of length $s^{-1} ? 500 \,s$
$= 500$ new unit of length
Speed of light in vacuum,
$c = 1$ new unit of length $s^{-1}$
Time taken by light of sun to reach the earth
$t = 8$ min and $20$ seconds
$= (8 ? 60 + 20) s = 500\, s$
$\therefore\quad$ Distance between the sun and the earth
$S = ct = 1$ new unit of length $s^{-1} ? 500 \,s$
$= 500$ new unit of length
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Physical World
The physical world includes the complications of the natural world around us. It is a type of analysis of the physical world around us to understand how it works. The fundamental forces that control nature are:
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