The ratio of the lifetime of the metastable excited state to the normal state is
Correct answer: A. 1:10^5
- A. 1:10^5
- B. 1:10^4
- C. 10^5:1
- D. 1:10^6
Explanation
A is the right option because The ratio of the lifetime of the metastable excited state to the normal state in lasers is typically of the order of 1:10^5. This ratio is crucial for the efficient population inversion required for laser action.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Nuclear Physics
Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
Practise Nuclear Physics
1,254 free Nuclear Physics 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 Nuclear Physics questions
Heavy water is used as a moderator in a nuclear reactor. The function of the moderator is
Which of the following isotopes is normally fissionable?
A radioactive element X(A,Z), on emitting an alpha particle, changes into
The example of nuclear fusion is
Nuclear fission experiments show that the neutrons split the uranium nuclei into two fragments of about the same size. This process is accompanied by the emission of several
Curie is a unit of