When working for Carl Zeiss, this scientist developed his namesake refractometer by placing liquid between illuminating and refracting prisms. For 10 points each:
[10h] Name this German physicist. A number named for this scientist is a measure of a material’s dispersion.
ANSWER: Ernst Abbe (“AH-buh”)
[10m] Abbe (“AH-buh”) numbers are calculated using the refractive index of the F, d and C lines named after this physicist. This physicist also names the diffraction regime for diffracted waves beyond his namesake distance.
ANSWER: Joseph von Fraunhofer
[10e] Using the F and C Fraunhofer spectral lines to calculate the Abbe (“AH-buh”) number only applies in this band of the electromagnetic spectrum, which lies between infrared and ultraviolet.
ANSWER: visible spectrum [or vision range; or visual spectrum; prompt on optical spectrum]
<Benjamin McAvoy-Bickford, Physics>