OPT-012 · Quantum optics Sample material

Applications of thermal radiation laws. The photoelectric effect

Applications of the laws of thermal radiation: optical pyrometers and light sources; photoluminescence (fluorescence, phosphorescence); the external and internal photoelectric effects, Einstein's equation and applications of the photoeffect.

Estimated time: 2 h 10 min 4 activities

Learning objective

Study the types and operating principles of optical pyrometers.
Compare light sources by luminous efficacy.
Understand the types of photoluminescence, Stokes' rule and Vavilov's law.
Study the laws of the external photoeffect, Einstein's equation and the internal photoeffect.

Expected outcomes

Calculates the true temperature from the radiation and brightness temperatures.
Finds the photoelectron energy, stopping voltage and red limit using Einstein's equation.
Calculates the characteristics of a photocell and a PMT (sensitivity, quantum efficiency, gain).
Distinguishes the energy yield and the quantum yield of luminescence.

Interactive modelThe external photoelectric effect

Activities

Lecture
Lecture · 55 min · required
The photoelectric effect. Internal and external photoeffects. Work function. Einstein's equation. Main characteristics of the photomultiplier and the photocell.
Practice · 55 min · required
Study of the photoelectric effect
Laboratory · 1 h 20 min · optional
Final test
Test · 20 min · required · pass ≥ 70%

Completion conditions

  • Lecture
  • The photoelectric effect. Internal and external photoeffects. Work function. Einstein's equation. Main characteristics of the photomultiplier and the photocell.
  • Final test — at least 70%