Assertion : Between any two given energy leve | vedclass

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(A) For a system with energy levels $A, B, C$ (where $E_A < E_B < E_C$):$1$. Absorption transitions: An atom in the ground state $(A)$ can absorb a ph

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

Vedclass · Answer

(A) For a system with energy levels $A, B, C$ (where $E_A $1$. Absorption transitions: An atom in the ground state $(A)$ can absorb a photon to jump to level $B$ or level $C$. Thus,there are $2$ possible absorption transitions ($A \rightarrow B$ and $A \rightarrow C$).$2$. Emission transitions: An atom in an excited state can drop to a lower state. From $C$,it can go to $B$ or $A$. From $B$,it can go to $A$. Thus,there are $3$ possible emission transitions $(C \rightarrow B, C \rightarrow A, B \rightarrow A)$.Since $2 < 3$,the number of absorption transitions is less than the number of emission transitions. The reason correctly explains that absorption is restricted to transitions from the ground state upwards,whereas emission can occur between any two levels where the initial state is higher than the final state.

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