Physics · Laser Physics
Which of the following statements regarding lasers is true?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
Share:
- 1The ratio of spontaneous emission to stimulated emission rates increases with a decrease in the frequency of radiation.
- 2The relation between the transition probabilities of spontaneous emission (A21) and stimulated emission (B21) is given by A21B21·uν = ehν/kT - 1, where uν is the spectral energy density.✓
- 3A Helium-Neon (He-Ne) laser operates as a three-level laser system.
- 4A Ruby laser operates as a four-level laser system.
Correct answer
The relation between the transition probabilities of spontaneous emission (A21) and stimulated emission (B21) is given by A21B21·uν = ehν/kT - 1, where uν is the spectral energy density.
Download Single Question PDF
Save this question and verified answer as a clean study sheet with live clickable link.
👥
Share with Friends & Study Groups
Challenge your peer aspirants on WhatsApp or Telegram to solve this question!
Online Test Series
Start Free Mock Test →Preparing for Physics?
Practice full-length mock tests with real exam timers, instant score analysis, and all-India ranking.
Chapter Practice
Practice Laser Physics MCQs →Want more practice questions on Laser Physics?
Solve complete topic-wise tests with detailed solutions on GkGet.
Related Practice Questions
Recommended practice questions in Physics · Laser Physics