Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What happens during absorption?
💡 Hint: Think about where the energy goes when a photon interacts with an atom.
Question 2
Easy
What is spontaneous emission?
💡 Hint: Consider an example like a light bulb that turns on by itself.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What occurs during spontaneous emission?
- True
- False
💡 Hint: Think about whether energy is released without any external help.
Question 2
What is the purpose of the B coefficients?
- They measure absorption only.
- They relate to absorption and stimulated emission.
- They measure spontaneous emission.
💡 Hint: Consider all the interactions between light and atoms.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
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.
Question 2
Explain how increasing the B12 coefficient affects laser performance.
💡 Hint: Think about probabilities and how they influence absorption and emission.
Challenge and get performance evaluation