What does a continuous spectrum imply about the space between a spectrograph and the light-emitting object?

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

d) physical means can be used to separate the components of air.

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.