LED Light Array with Wavelength Labels – Planck’s Constant & Photon Energy Demonstrator (11 LEDs)

Product Overview

Using LEDs to Demonstrate Planck’s Constant: The Sci-Supply SS20722 LED Light Array is a compact classroom demonstration device designed for exploring light wavelength, photon energy, and Planck’s constant in physics and physical science laboratories.

The vertical LED array features 11 individual LEDs, each clearly labeled with its color and wavelength in nanometers (nm). Students can easily observe how wavelength varies across the visible spectrum from deep red to violet.

Each LED can be activated individually or illuminated simultaneously, making the device ideal for demonstrations involving:

• photon energy

• Planck’s constant

• wavelength vs frequency relationships

• the visible light spectrum

The compact, stable base makes the unit easy to use during lectures, lab demonstrations, and student investigations.

Key Features

• 11 vertically mounted LEDs covering the visible spectrum
• Each LED labeled with wavelength (nm) for easy reference
• Selectable LEDs – operate individually or all together
• Compact vertical design ideal for classroom demonstrations
• Stable base for tabletop use in lecture halls or labs
• Power supply included – plug into standard North American outlet

Educational Applications

This LED array is ideal for demonstrating key concepts in physics and physical science courses, including:

• Planck’s Constant Experiments
• Photon Energy vs Wavelength
• Visible Light Spectrum Demonstrations
• Color and Wavelength Relationships
• Introduction to Quantum Physics

Students can directly compare the wavelengths of visible light while exploring the relationship between energy and wavelength.

LED Wavelengths Included

The array includes LEDs labeled with the following wavelengths:

• Deep Red – 640 nm
• Red – 626 nm
• Orange – 604 nm
• Yellow – 590 nm
• Green – 570 nm
• Bright Green – 525 nm
• Turquoise – 505 nm
• Blue – 470 nm
• Deep Blue – 455 nm
• Violet – 400 nm
• White reference LED

Specifications

Model: SS20722
Brand: Lethan Corporation
LED Count: 11 LEDs
Power Supply: Included
Voltage: 110V (North America)
Mounting: Vertical array with stable base
Operation: Individual or simultaneous LED selection

Trusted by Educators

Sci-Supply is an American small business based in Southwest Ohio, proudly serving teachers, schools, and universities since 2004. We are committed to providing high-quality laboratory equipment along with responsive customer support.

When you purchase from Sci-Supply, you’re supporting a small American business dedicated to science education.