Which term is defined as the ratio of the speed of light in a vacuum to the speed of light in the material it is passing through? index of reflection

index of refraction

angle of incidence

angle of reflection

According to valence bond theory, which orbitals overlap in the formation of the bond in hf according to valence bond theory, which orbitals overlap in the formation of the bond in hf 2s on h and 2p on f 1s on h and 2s on f 1s on h and 1p on f 1s on h and 2p on f 1s on h and 3p on f