The PCA-01 is an educational apparatus designed to determine Planck’s Constant (h) using the emission characteristics of Light Emitting Diodes (LEDs). This compact, low-voltage setup is ideal for modern physics labs and offers a safe, straightforward method to experimentally verify the quantum nature of light.

By measuring the threshold voltage for LEDs of different wavelengths and plotting the data, users can extract a value for Planck’s Constant. The setup includes a set of pre-calibrated LEDs, a precision digital voltmeter, and all necessary circuitry to carry out the experiment.

Ideal for undergraduate students, this apparatus allows clear understanding of photon energy, semiconductor behavior, and quantum theory principles in a hands-on way.

Key Features

• Calculates Planck’s Constant (h) using the LED voltage-wavelength relationship

• Includes LEDs of known wavelengths: red, yellow, green, blue

• Built-in digital voltmeter and current-limiting circuits

• Simple plotting of forward voltage vs. frequency

• Safe, low-voltage operation suitable for student labs

• Durable design with clear labeling and easy setup

• Comes with instruction manual and experiment sheet

Applications

• Determination of Planck’s Constant (h)

• Study of photon emission in semiconductors

• Understanding energy band gaps and quantized light emission

• Ideal for physics teaching labs, B.Sc., M.Sc., and engineering courses