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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is population inversion?
💡 Hint: Think about the balance of energy states in atoms.
Question 2
Easy
Why is pumping necessary for a laser?
💡 Hint: Consider how energy influences the states of atoms.
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 condition is necessary for population inversion?
- N1>N2
- N2=N1
- N2>N1
💡 Hint: Think about what 'inversion' means.
Question 2
True or false: Stimulated emission is less significant than spontaneous emission.
- True
- False
💡 Hint: What dominates when population inversion is achieved?
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given a system where there are 150 atoms in the ground state, how many need to be in the excited state for population inversion?
💡 Hint: Think about how N2 must be greater than N1.
Question 2
A laser operates with a pumped medium resulting in a 4x increase in photon production due to stimulated emission. If initially there were 500 photons, how many are there after stimulation?
💡 Hint: Consider how stimulated emission leads to a multiplying effect on the number of photons.
Challenge and get performance evaluation