Figure shows the energy levels P, Q, R, S and G of an atom where G is the ground state. A red line in the emission spectrum of the atom can be obtained by an energy level change from Q to S. A blue line can be obtained by following energy level change.
Correct answer: C. R to G
- A. R to S
- B. Q to R
- C. R to G
- D. P to Q
Explanation
If E is the energy radiated in transition then ER→G > EQ→S > EQ→R > EP→Q. For getting blue line energy radiated should be maximum (E = 1/λ).
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Atoms emit or absorb light at specific wavelengths because electrons occupy quantized energy levels and change levels by absorbing or releasing photons. The topic covers emission and absorption spectra, spectral series, hydrogen’s line spectrum, energy-level transitions, and the relation between wavelength, frequency and photon energy.
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