A simple pendulum has a time period \( T_{1} \) when on the earth's surface and \( T_{2} \) when...

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A simple pendulum has a time period \( T_{1} \) when on the earth's surface and \( T_{2} \) when taken to a height \( R \) above the earth's surface, where \( R \) is the radius of the earth. The value of \( T_{2} / T_{1} \) is
[IIT-JEE 2001]
(a) 1
(b) \( \sqrt{2} \)
(c) 4
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