Achilles Heel: The Tyndall Effect

Achilles Heel: The Tyndall effect by Dragon Blaze 99

Also known as Tyndall scattering, describes light scattering by particles in a colloid or fine suspension. It is similar to the effect known as Rayleigh scattering, in that the intensity of the scattered light varies inversely with the light's wavelength; therefore, the colour blue, with the shortest wavelength of visible light, is scattered the most. The difference between the two phenomena is in the size of particles involved; whereas Rayleigh scattering concerns molecules, which are much smaller than visible light wavelengths, the Tyndall effect occurs with solid or liquid particles near or even above the size of a wavelength of light. A practical example of the Tyndall effect is a Kingfisher’s feathers appearing a vibrant blue.

Whenever the super being becomes exposed to natural light (sun, moon, fire etc.), their unusual physical characteristics shine through e.g. mutant traits or alien appearance. No amount of disguising makeup or hair dye will help the character; they must avoid natural light (and light-based super powers). A shape shifter with this flaw sees their attacks reduced by 75%, and are very distracted when trying to maintain their disguise when in natural light. Shades of blue for hair, eyes etc. would be the most common, however, green (Male Mallards’ head feathers) and any other colour accepted by your GM would be applicable. E.g. 2 a metamorphed dragon that had red scales in its human form when exposed to natural light would have red skin that looks scaly