Planck's Constant

Explore the Physics of Kinetic Energy, Frequency of Light, Electromagnetic Waves and more with this Planck's Constant Apparatus.

The apparatus is designed to determine the approximate value of Planck's Constant using the elbow voltage in the characteristic curves of a number of LEDs. There are 7 LEDs covering from deep blue at 470nm to near IR at 940nm mounted on the box with sockets for voltage and current measurements.

LED Wavelengths:

• 470 nm,
• 505 nm,
• 570 nm,
• 605 nm,
• 655 nm,
• 880 nm,
• 940nm

By monitoring the voltage at which each LED just begins to emit light a graph of energy input as a function of light emitted frequency can be plotted and an approx value of Planck's constant can be deduced.

Dimensions:

• (W)203mm x (L)121mm  x (H)26mm  

Includes a plastic viewing tube, instructional guide and experiment examples.

The apparatus is perfect for any classroom and useful for a variety of physics experiments

Additional Equipment Required (not included):

• Power Supply (9V DC),
• Voltmeter (0-9 Volts),
• Ammeter (20mA)
• 6 x Stackable Plug Connecting Leads.