The Light Around Us Exhibition: Utilisation of LEDs in Scientific Applications
Light transmits information from the external environment to our eyes and brains. Perceiving colours and forms is instinctive; nonetheless, light presents a complex phenomena upon closer examination. The Light Around Us has seven interactive exhibitions. They exhibit several fundamental characteristics of light, including absorption, reflection, refraction, and diffraction. Visitors may manipulate light beams using lenses and mirrors, alter the colour of common items, disperse white light into its constituent colours, and generate shadows via overlapping colours.
Hued Shadows Coloured Shadows
This display is often located at several scientific museums. Previously, The show Guys constructed this show utilising three 150-watt spotlights in conjunction with red, green, and blue theatrical gels. The updated LED Colour Shadows use three Cree Colour Star boards (red, green, and blue).
The three Cree star boards are positioned within a compact heatsink structure, elevated a few feet above a white table. The three beams of coloured light are directed towards the white table to create an overlap. The amalgamation of these three fundamental colours on the table appears white to the observer. When you extend your hand or an object over the table, the resulting shadows exhibit a spectrum of colours rather than the anticipated black or dark grey. The sole location exhibiting black or dark grey is at the centre, when all light is obstructed. At the periphery of the black shadow, when just two colours are obscured, red, blue, and green are visible. Additionally, when only one colour is obstructed, cyan (the result of blue and green amalgamation), yellow (the product of red and green fusion), and magenta (the combination of red and blue) become visible. This straightforward activity provides a comprehensive explanation of the principle of colour mixing.
The vibrant hues and efficacy of the LEDs significantly enhanced this show. The colours were vivid and intense, suitable for blending and demonstrating the various hues that may be produced from these three main colours. The efficiency contributed to reduced operational costs, as the lights would remain on throughout the day.
Bending of Light Rays
The Exhibit Guys developed specialised optics to generate three parallel, laser-like beams of light from the LEDs, which traverse a white table. The table has lenses, mirrors, and prisms of diverse forms, allowing visitors to explore the manipulation of light through bending and reflection.
SpectrumPrism
This exhibit contrasts with the Coloured Shadows display. It demonstrates the separation of white light into its component colours when it passes through a prism. In this presentation, The Exhibit Guys attempted to utilise our most luminous Cree LEDs for prototyping; nonetheless, they remained insufficiently bright for their requirements.
This display employs our LEDs in white, red, green, blue, and ultraviolet. The video below likely conveys the essence of the display. The compartment contains many commonplace items and toys illuminated by these LEDs. Rotating the wheel induces a cycling of lights through all potential colour combinations, resulting in significant alterations in the perceived colours of things within the chamber.
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