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Planck Constant Apparatus (LED Method)

Plancks constant using led at least 4 different colours.

The setup consists of :

  1. Variable power supply with precision voltage control.
  2. Digital Voltmeter and milliammeter.
  3. Set of LED with mechanical fittings [ Four nos. colour : Red, Green, Yellow and orange]
  4. Sensor and detector system for detection of threshold voltage.