The formula for the Paschen series for the Hydrogen spectrum is _.
Correct answer: D. 1/λ=Rh(1/32 - 1/n2); n=4,5,6
- A. 1/λ=Rh(1/22 - 1/n2); n=3,4,5
- B. 1/λ=Rh(1/42 - 1/n2); n=2,3,4,5
- C. 1/λ=Rh(1/42 - 1/n2); n=5,6,7
- D. 1/λ=Rh(1/32 - 1/n2); n=4,5,6
Explanation
The correct formula for the Paschen series is Option D: 1/λ=Rh(1/32 - 1/n2); n=4,5,6. The Paschen series refers to electron transitions ending at the n=3 energy level, resulting in spectral lines in the infrared region. The other options represent different series or incorrect configurations: Option A represents the Balmer series, transitioning to n=2. Option B does not correspond to any recognised series due to its incorrect configuration. Option C represents the Brackett series, transitioning to n=4.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Atomic Spectra
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.
Practise Atomic Spectra
356 free Atomic Spectra MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Atomic Spectra questions
The penetrating power of X-rays increases with:
X rays are affected by:
The velocity of X rays is equal to that of:
The energy of the 4th orbit in a hydrogen atom is:
If the ionisation energy of a hydrogen atom is 13.6 eV, its ionisation potential will be:
The wavenumber of a photon in the Brackett series is 9/400 R then the electron transited from orbit with the quantum number: