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The duration of a laser pulse is `10^(-8)` s. The uncertainly in its energy will be

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The duration of a laser pulse is `10^(-8)` s. The uncertainly in its energy will be
A. `6.6xx10^(-26)`J
B. `6.6xx10^(-42)` J
C. `6.6xx10^(-34)` J
D. `1/6.6xx10^26` J
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