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BITSAT 2011

Exam: BITSAT
Year: 2011
Subject: Physics
Chapter: Atomic Physics

BITSAT 2011 · Physics · Atomic Physics

The energies of energy levels A, B and C for a given atom are in...

The energies of energy levels

\mathrm{A}, \mathrm{B}

and

\mathrm{C}

for a given atom are in the sequence

\mathrm{E}_{\mathrm{A}}< \mathrm{E}_{\mathrm{B}}< \mathrm{E}_{\mathrm{C}}

. If the radiations of wavelengths

\lambda_{1}, \lambda_{2}

and

\lambda_{3}

are emitted due to the atomic transitions

\mathrm{C}

to

\mathrm{B}, \mathrm{B}

to A and

C

to A respectively then which of the following relations is correct?

Options

A $\lambda_{1}+\lambda_{2}+\lambda_{3}=0$
B $\lambda_{3}=\lambda_{1}^{2}+\lambda_{2}$
C $\lambda_{3}=\lambda_{1}+\lambda_{2}$
D $\lambda_{3}=\frac{\lambda_{1} \lambda_{2}}{\lambda_{1}+\lambda_{2}}$

Correct answer

D. $\lambda_{3}=\frac{\lambda_{1} \lambda_{2}}{\lambda_{1}+\lambda_{2}}$

Step-by-step solution

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