During the production of LASER, when the excited state E2 contains more atoms than the ground state E1, the state is known as:
Correct answer: A. Population inversion
- A. Population inversion
- B. Ground State
- C. Excited state
- D. Metastable state
Explanation
Population inversion refers to a condition in which the number of atoms or molecules in an excited state (such as E2) is greater than the number in the ground state (such as E1). This is a necessary condition for the amplification of light in a laser.
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
What does CAT stand for in X-ray technology?
The kinetic energy of electrons by applying potential difference V1 across the x-ray tube is (KE)1, while the V2 potential difference produces kinetic energy equal to (KE)2. What, will be the value of (KE)1:(KE)2 if the ratio of potential difference V1:V2 = 2:3?
What is the type of characteristic X-ray photon whose energy is given by relation 'hf =EM - EK'?
Which of the following X-rays has the largest intensity?
Which of the following series lie in the visible region?
Fluorescence is the property of absorbing radiant energy of ...... frequency and re-emitting energy of _ frequency in the visible region of electromagnetic spectrum.