[M | t | —]
Photoelectric effect demonstrated with common "solar cell".
[M | t+ | —]
Photoconductivity of CdS cell moved through the continuous spectrum.
Insulator or Conductor?
[S/M | t++ | —]
Resistance of glass vs. temperature.
[s | t++ | ★★★]
The Hall voltage of a semiconductor is measured as a function of applied magnetic field.
[S | t+ | ★★★]
Meissner Effect suspension of magnet above superconducting disc.
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