According to the big bang theory, after the "bang," the universe remained dark until

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

What’s #16 asking and how do i solve it?