Q.

The expression for Bohr's frequency rule is

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a

v=ΔEh=E2-E1h

b

v=ΔE·h=E2-E1·h

c

vh=ΔE+h=E2-E1+h

d

v=ΔEh=E1-E22

answer is A.

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Detailed Solution

The frequency of radiation absorbed or emitted when transition occurs between two stationary states that differ in energy by ∆E, is given byv=ΔEh=E2-E1hWhere E1, E2 are the energies of the lower and higher allowed energy states respectively. This expression is commonly known as Bohr's frequency rule.
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The expression for Bohr's frequency rule is