Determine Planck’s constant using LEDs at different temperatures.

• Built-in heater: The heating element is built in the system and is powered by 12 V input
• The efficient heating mechanism heats the system to required temperature in a few minutes with minimum power requirement of 40 W
• Modular design: The modular design of the setup allows testing of different colored LED’s
• Built-in voltage and temperature probe: All the necessary parameters to be measured are available directly on the setup itself

This experiment uses the photoelectric effect and Einstein's equation to measure the constant h. The box also contains a class set of LED boxes where the constant can be measured using a voltmeter and an ammeter using the equation E = hf.