LED ARRAY [L.E.D]: Display
Comprises a 300mm high x 30 mm diameter tower with eleven different coloured LED’s spanning the visible light spectrum evenly spaced along it’s length. This LED array allows students to explore the action of colour filters, demonstrate diffraction at different wavelengths and confirm the wavelength for each individual colour. The eleven LED’s (violet, deep blue, blue turquoise, bright green, green, yellow, orange, deep red and white) can all be illuminated at the one time or each colour can be individually illuminated by switching a rotary switch at the top of the LED display. Depending on the diffraction grating used first, second and third order fringes can be observed and used for doing calculations. By knowing the voltage and wavelength for each LED Planck’s Constant can be determined. Students have a great opportunity to consider and minimise sources of error in their experimental work. Each LED has it’s colour and wavelength printed alongside. Has an ON/OFF switch and powered by a 5 V DC mains adaptor (supplied).