Planck’s Constant Apparatus Using LED

Specifications:

Light – Emitting diodes (LED’s) convert electrical energy into light energy. They emit radiation of visible wavelength when they are in “forward biased”. This caused by electrons from ‘n’ region in the LED giving up light as they fall into hales in ‘p’.

We use LEDs in this experiment because each color of LED has different threshold voltage at which electrons starts being produced. Measuring this voltage together with known values for the emission wavelength provides a path to finding a value for the Planck Constant. LED’s work on the principal of electroluminescence.

This Instrument comprises of the following:

• One ON/OFF main switch is given on panel with power (230V, 50 Hz).
• One rotatory knob is given to set voltage.
• Different colors of LED’s with their input and output sockets with one common terminal.
• The range of ammeter is switched between 2000uA and 20mA and the range of voltmeter is 0-5V at 150mA.
• We are providing 4mm patch cords with apparatus for connections.
• Body: Plastic
• Packing: Corrugated Box
• Weight: 1.8 kg Approx.
• Dimensions: 34 cm X 25 cm X 13 cm Approx.
• HSN Code: 8504
• GST: General Standard 18%
• Brand: OM LABS