1.1 - Einstein’s Theory (A & B Coefficients)
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What happens during absorption?
💡 Hint: Think about where the energy goes when a photon interacts with an atom.
What is spontaneous emission?
💡 Hint: Consider an example like a light bulb that turns on by itself.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What occurs during spontaneous emission?
💡 Hint: Think about whether energy is released without any external help.
What is the purpose of the B coefficients?
💡 Hint: Consider all the interactions between light and atoms.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
A laser uses a population inversion of 10:1. If 1000 atoms are in the ground state, how many are in the excited state?
💡 Hint: Use the population ratio to find out how many excited atoms are present.
Explain how increasing the B12 coefficient affects laser performance.
💡 Hint: Think about probabilities and how they influence absorption and emission.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.