Electromagnetic Spectrum Concept

Demonstrates that white light is composed of all visible wavelengths by dispersing it into a continuous spectrum with a diffraction grating. Provides a foundation for spectroscopy and the electromagnetic spectrum.

Glass transmits longwave UV but blocks shortwave UV, demonstrated using a phosphorescent disc as a visible indicator. A plastic container with CFL phosphor fragments shows a similar blocking effect. Students …

An infrared camera reveals thermal radiation from everyday objects, showing that all objects emit electromagnetic radiation and that materials have strikingly different optical properties in the infrared vs. visible spectrum. …