Chapter 15.1
Light Comes in Lumps: Blackbody Radiation and the Photoelectric Effect
A hot poker glows red, then orange, then white, and a dim ultraviolet lamp kicks electrons out of a metal that a blinding red floodlight cannot touch. Neither fact makes sense if light is only a wave.
in preparation · lesson 24 of 27
By the end
- 01Describe a blackbody's continuous spectrum and use Wien's law and the Stefan–Boltzmann law
- 02Explain why a threshold frequency exists and why brighter light does not eject faster electrons
- 03Compute the maximum kinetic energy of ejected electrons from the frequency and the work function
- 04Describe the stopping-potential measurement