Assertion: The ratio for time taken for light emission from an atom to that for release of nuclear energy in…
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 $10^{-8} \mathrm{~s}$.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Solution
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 $=\frac{10^{-8}}{10^{-6}}=\frac{1}{100}=1: 100$