Podcast
Questions and Answers
What is the main purpose of the active medium in a laser system?
What is the main purpose of the active medium in a laser system?
- To absorb radiation energy
- To create population inversion (correct)
- To generate the laser beam
- To provide a cavity for optical resonation
In a laser system, what is the significance of population inversion?
In a laser system, what is the significance of population inversion?
- It increases the number of atoms in lower energy states
- It reduces the lifetime of excited states
- It ensures more atoms are in a higher energy state than the lower energy state (correct)
- It helps in generating optical resonation
Which method is commonly used for pumping action to achieve population inversion in gas lasers?
Which method is commonly used for pumping action to achieve population inversion in gas lasers?
- Optical pumping method
- Direct conversion method
- Elastic atom-atom collision method
- Electrical discharge method (correct)
What type of levels lie in the forbidden gap of the host crystal in a crystal system with impurity atoms?
What type of levels lie in the forbidden gap of the host crystal in a crystal system with impurity atoms?
What is the role of the optical resonator in a laser system?
What is the role of the optical resonator in a laser system?
What property of laser light ensures that all the emitted waves are exactly in phase with each other?
What property of laser light ensures that all the emitted waves are exactly in phase with each other?
How does the intensity of laser light compare to ordinary light?
How does the intensity of laser light compare to ordinary light?
Which characteristic of laser light describes its property of energy, frequency, or wavelength nearly being the same for all emitted photons?
Which characteristic of laser light describes its property of energy, frequency, or wavelength nearly being the same for all emitted photons?
What did Einstein demonstrate in 1917 regarding the transition processes of absorption, emission, and stimulated emission?
What did Einstein demonstrate in 1917 regarding the transition processes of absorption, emission, and stimulated emission?
Why does laser light have a small wavelength range and higher intensity compared to ordinary light?
Why does laser light have a small wavelength range and higher intensity compared to ordinary light?
