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Assertion: The ratio for time taken for light emission from an atom to that for release of nuclear energy in fission is $1: 100$.
Reason: Time taken for the light emission from an atom is of the order of $10^{-8} \mathrm{~s}$.
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Reason: Time taken for the light emission from an atom is of the order of $10^{-8} \mathrm{~s}$.
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The correct answer is:
If both assertion and reason are true and reason is the correct explanation of assertion.
Time taken for the light emission from an atom $\approx 10^{-8} \mathrm{~s}$.
Time taken for release of energy in fission $\approx 10^{-6}$
Required ratio $=\frac{10^{-8}}{10^{-6}}=\frac{1}{100}=1: 100$
Time taken for release of energy in fission $\approx 10^{-6}$
Required ratio $=\frac{10^{-8}}{10^{-6}}=\frac{1}{100}=1: 100$
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