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WalesPhysicsQuick questions
Unit 2 Electricity and Light
Quick questions on Lasers: stimulated emission and population inversion - WJEC A-Level Physics
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is properties of laser light?Show answer
Laser light is intense, monochromatic (single wavelength), coherent (constant phase relationship) and collimated (a narrow, parallel beam). Each property traces back to stimulated emission producing identical photons in a cavity that selects one direction.
What is q1?Show answer
An electron drops between two levels separated by . Find the frequency of the emitted photon. Take .
What is q2?Show answer
State two properties of laser light and link one to stimulated emission. [2 marks]
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