A 90-nm-thick coating is applied to the lens. What must be the coating's index of refraction to be most effective at 480 nm? assume that the coating’s index of refraction is less than that of the lens.

The correct answer is b, social stratification is needed for a society to exist. marxist theory regarding social stratification is that due to the differing economic capacities among people in society, a natural separation occurs between those that own the means of production and those that sell their labour in the production chain. 

No must be 16 or 17 then you have to have a parent or guardian to take you out or   a court give written consent to their withdrawal. smh why would you be pregnant at

Answereyespot