Basic Fuchsin Film

This is a film of basic fuchsin viewed with reflected light. The film on the left is in air. The black band down the center of the image is the edge of a coverslip. On the right side the fuchsin film is under 1.510 refractive index immersion oil. That matches the real part of the refractive index (n) of basic fuchsin at a wavelength of about 500 nanometers.

Reflected Illumination

Definition/Function:

The reflectivity of a material is affected by the refractive index of the medium through which it is observed.

Significance in the Environment:

Characteristic Features:

Associated Particles:

References:

1. Cartmel, W.B., "Anomalous dispertion and absorption of fuchsin", The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, vol 6, no. 32, pp. 213-227, 1903. https://zenodo.org/record/1871833#.ZERns3bMLcs.