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It glows in the dark

Some substances produce visible light if excited by radiationEnergy transmitted in the form of electromagnetic waves or subatomic particles., such as invisible ultravioletElectromagnetic radiation (energy) of a wavelength just shorter than the violet (shortest wavelength) end of the visible light spectrum and thus with higher energy than the visible light. light. Visible light that is produced only when the radiation source is present is called fluorescenceThe emission of visible light from an object when the object is bombarded with electro-magnetic radiation, such as ultraviolet rays. The emission of visible light stops after the radiation source has been removed.. Certain chemicals in laundry soaps react with sunlight to...

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1. Introduction
2. Experiments with a shutter
3. Making waves
4. It glows in the dark
5. Project 1 - Looking for the Glow: Which objects glow under black light?
6. Project 2 - Refraction and Defraction: Making a rainbow
7. Design Your Own Experiment