1. describe the nature of tetragonal crystals in terms of refractive index. how many indicies are there and how are they observed and labelled?

2. how many refractive indicies do monocljnic crystals have and what do we use to visualize them in optical minerology?

Astate's representation in the u. s. senate is based on a) equal representation. b) the state's population. c) the state's electoral votes. d) the size of their major cities. this independent regulatory agency was created in 1974 to oversee and regulate the financing of political campaigns in the united states. a) warren cthis independent regulatory agency was created in 1974 to oversee and regulate the financing of political campaigns in the united states. a) warren commission (wc) b) federal election commission (fec) c) equal opportunity commission (eoc) d) securities and exchange commission (sec)